Either remove the crash and leave the power alone, or remove the crash and remove the ability to stack. The way my build is currently set up, I can take both the 50+5 standard recharge IOs out of Rage and have a 2-second window between duration and recharge. Meaning I can set it to auto-fire and be punished if a support player shows up with a recharge buff. Oh, or if I use my Ageless Core Epiphany, which I slotted specifically because as a Tanker I want to support my team. Replenishing their endurance and boosting their recharge rates. You know, things that are supposed to be helpful.
What am I supposed to do with those two slots? Put a To-Hit set in there? Knockout Blow and Foot Stomp already have 345.6% and 283.9% accuracy bonuses, respectively. The only useful thing I can slot would be two pieces of Adjusted Targeting for a whopping 2% damage increase. That damage buff isn't going to help much while I'm eating a -999% damage debuff that I cannot build to avoid without ripping all the global recharge out of my build that I slotted to make Knockout Blow and Foot Stomp better, not solely for the benefit of having 2 stacks of Rage for 50 seconds.
I can generally rely on group buffs to make up for the resistance and defense debuffs from the crash, and I could always use Ageless Core Epiphany to eat the endurance penalty, but the -999% damage debuff makes me feel like Super Strength is anything but super.