IndianaJoe3

I'm heavily on the "It depends on the campaign" side of things.
 
It also depends on the likely duration based on the the reversal condition. Which makes me consider that reversal conditions should probably be figured somehow into the cost of transformation, but that's a different discussion.
 
If it's going to be reversed by the end of the session, I'd call it cosmetic in any except a very heavy role-playing campaign, and maybe only more then, if the characters have reason to believe it's long-term or permanent. 
 
So, let's assume it's long-term or effectively permanent.
 
For a game where where non-combat time and role-playing are important, and this is take seriously at all, then this is at minimum a minor, and more realistically a major transformation. IndianaJoe3 mentions social limitations, but the biggest imposed limitation here is going to be gender dysphoria. That could be written up as a psychological limitation, a social limitation, or a combination. It could also be argued as a physical limitation, but that might be a stretch.
 
And gender dysphoria is very real, and, depending on the person can be crippling. I, luckily, never had a severe dose of it, but I have friends who have. Bought realistically, the lims involved could easily top 20 or thirty points. 
 
And of course, it wouldn't aways be lims added. For a transgender person who hasn't started transitioning yet, it could easily remove a slough of lims. If they have started transitioning, it would depend on what exactly the transform did to them. If it just goes off your genes, swaps some chromosomes, and rebuilds you, I personally would be fine with it. If it's some metaphysical reversal, where I end up physically a trans guy at the equivalent stage of physical transition, I burn down the world to get the reversal or take pretty savage revenge if it's not possible. 
 
I'm pretty confident for most non-transgender people,  a permanent change would not be a small thing. It would upend their lives and sense of self. Played realistically the affected person would be more like my second reaction above. They would need to find the reversal. It would consume much of their life until they did. So, in a serious, RP heavy campaign, I really see it as a major transform.
 
To the recognizability issue, that is variable, but generally the change would probably make pretty big differences. For the closest real-world equivalent of a boy-girl gun, hormone replacement therapy (HRT), results vary from, "yeah, she's looks a little more feminine now" to "There's no way that's the same person." Especially with trans women, because a lot of the changes testosterone makes to the body (height, build, facial features), are at to the bone, and thus not as subject to the kind of changes that HRT can make. An actual boy-girl gun wouldn't be subject to those limitations, so, big, big, changes (on average). Anecdotally, recently while grocery shopping, I ran across some people I gamed with for  8-10 hours every week for years, and they didn't recognize me, even when looking straight at me. And I started HRT really late in life and didn't get the full benefits a younger person would have gotten. 
 
 
 

Would being a mechanic be a good analogy?
 
Some people repair cars for a living (wizards). Some people fix their own cars (dabblers). Most people just pump their own gas and change the brake light when it burns out (amulets and daily prayers).

One question we haven't asked yet is, "Is being one gender a Social Complication?" A Minor Transform can only add 10 points of Complications, but an Major Transform can add 20.

In 6e, I've used Damage Negation for a similar effect.
 
Size Matters:  Damage Negation (-3 DCs Physical, -3 DCs Energy) (30 Active Points); Limited Power Not vs AoE or attacks specifically designed for use against large targets) (-1/4)
 

This sounds like the Burnout option for Requires A Roll.

This sounds like the Burnout option for Requires A Roll.

In 6e, I've used Damage Negation for a similar effect.
 
Size Matters:  Damage Negation (-3 DCs Physical, -3 DCs Energy) (30 Active Points); Limited Power Not vs AoE or attacks specifically designed for use against large targets) (-1/4)
 

If you want cheap, it's hard to beat FATE Accelerated. The rules are only $5, and you only need 4 dice and some tokens (like glass crafting beads) to play.

The last campaign I ran had an absolute CV ceiling (including levels), and restrictions on PSLs. You couldn't have more than two, "stacking" levels. For example, you could have 2 PSLs vs hit locations, and two vs range modifiers, but not 4 vs hit locations.

You might want to think of a set of effects that he will use often, and work from there. Creating a wall or a shooting platform would be Barrier. A gun would be Blast (possibly with Variable SFX or Variable Advantage, to represent creating different guns). Ropes that tie enemies up would be an Entangle. Think about how the character will use the power, and buy abilities based on those uses.

How much for just the planet?

I picked option 3 because it had a very Macross/Robotech feel to it (probably because of the mechs and aliens).

You don't need Extra Limbs to carry one or two people out of combat. However, if you want to carry more than that, or carry people and still have your hands free, you need Extra Limbs.

APG1 also has a, "stunning" option for Change Environment that might be what you want.

I'd suggest getting the fiction right, before you start looking at mechanics.
 
That is, how magic fits into the setting and its societies. That's particularly important since magic will shape those societies.
 
Once you've got all that sorted, then you can look at all the crunchy blah blah blah.

He hasn't mentioned anything on Facebook. He hasn't posted much there either, but he routinely makes a Saturday cat post and that hasn't changed.

I would give it +1d6 for an exhibition of power, and +1d6 for a good description.
 
Buying PRE will always be a better value (and less complicated) than buying other powers for the sole purpose of using them in PRE attacks. 

I would give it +1d6 for an exhibition of power, and +1d6 for a good description.
 
Buying PRE will always be a better value (and less complicated) than buying other powers for the sole purpose of using them in PRE attacks. 

Hey guys! I found the bard!

I think APG1 has some suggestions regarding Complications and Foci.

It would be funny if Foxbat could actually do this.

Hey guys! I found the bard!

It's also in the 6e Equipment Guide.

Hey guys! I found the bard!

He's still active on FB, and hasn't mentioned anything drastic going wrong. I suspect he's busy with, "stuff" right now and doesn't have much time for answering Hero questions.