I understand there are powers that are not effected by the damage crash, but other sets do not have to work around that.
Like, for a set called "super strength" having a moment every minute or so where you are no longer strong feels off. Titan Weapons, STJ and even MA or Stone melee all can play off your character being super strong physically without stopping. Incarnate judgement aside as all melee sets can pick it up, and for the whole leveling process it is a weird stop to gameplay where you cant use your "strength" every so often. I agree that rage as is needs a downside for how long it lasts, but when given the option I'd rather go for non stop smashing than smashing a bit better then forced to break.
Edit: even with stacked rage, where does SS currently sit compared to other melee sets to really warrant the harsh crash? If there are sets that are statistically better even with stacked rage... they do more without a downside.