Already at limits
In the discussion of Speed vs Rapid Fire and levels, there are ads and disads to both. But perhaps it's worth noting that =IF= you were playing in a campaign that had limits to things like Speed and/or Maximum attack, changing from 4th edition to 5th edition changed things quite a bit. If you had players who were already at the old limits (say, for Speed), adding SWEEP and RAPID FIRE and MULTIPLE POWER ATTACKS seriously increased their firepower without changing their character sheets one bit. So to keep the campaign in balance you need to have all the other players and all of the villians do it as well. This is not necessarily bad - but it does change the violence level. The balance of "what levels of offense and defense are appropriate for this campaign" may have to shift.
