Please, please not this. A button that wants my attention, but which I'm not supposed to click? And if I invest in recharge bonuses, it's going to be there until I do click it? I'm going to have anxiety over accidentally clicking Rage when it's already active.
You want to balance a single buff for two different groups (Tanks and DPS). Impossible. As a Tanker, I just want to be able to enjoy Super Strength without a defense crash. This weird, social engineering "don't click me!" ring is not the way, but I have an idea for you.
Super Strength Stances!
Defensive Stance -- Rage grants a greatly reduced damage buff, still stacks with high recharge if you have it, but no longer has a defense crash.
Offensive Stance -- Rage behaves like it does on the Homecoming live servers, defense crash included.
Stance cannot be changed while Rage is active.