🤔 15 pts was 1/4 the Apts of a 60 STR, 1/5 that of a 5d KA.
Multipower slots were 1/5th the Apts of the powers in them, 1/10th for an ultra. (And it was unclear how limitations interacted with that. Iirc)
By the rough, not exactly vigilant for optimization shinnanigans, standards of the day (with the figured char loopholes wide open), doesn't sound insane.
So that's 6th, which 🤷♂️ idk?
But say in an ed I do know, you had a character in a 60apt limit game, with 10 STR and 3d+1 hka vs one with 30 STR and a 2d hka? 20 pts free STR?
Say they both want an EBe?
HKA goes in a multipower, 10d Ebe for the first character, 6d for the second.
Now, the second character could just pump up the slot, by 20 pts.
If they want a third power, the higher STR character could pump up the reserve, instead, but the campaign limit caps the KA.
STR has efficiencies, multipower has different ones.
Or, consider the first character just takes a 4d RKA, no range. There's 20 points "free" to spend on anything.
"Free" is never really free, cost breaks always had strings.