You cant legitimately separate the two, because rage by itself without the Procs, or set bonuses make it worlds harder than without them. Rage by itself sucks honestly its not OP and its a hard mechanic to work around when it crashes.
In game i would dispute this, because there is no way when playing a Hybrid resist/defense set without the existence of Procs and other set bonuses against certain types of enemy that can defense debuff especially that Rage will put you in a bad way really fast.
No you wont ever get me to accept temp powers to buff around a mechanic designed to gimp you - and rightfully so - as a means to overcome the mechanic. Sorry but that dog doesnt hunt.
LoL if you read back a ways on some of the old rage topics you can find tons of this, maybe even one where i shelved my Invul/SS last June because i hadnt figured out how to overcome the new rage crash yet. Theres lots of gripes out there about rage crash and how bad it is.
but again, rage crashes - therefore it cant be 100% up, the crash is there whether you admit it or not. you have 10 seconds of not being able to do anything, and a frequent back to back 10 seconds if you are double stacking rage.
Its not perma even if you have it running its never perma because... it... will... crash.
If anything is broken it isnt rage its SS as a whole, because as it is its fun to have that vulnerability to work around. Saying it isnt a vulnerability is disingenuous at best.
I personally dont see it as broken anymore, because its limitation is in the crash. You literally have to build around it to not matter.