Rather than increasing the damage REs do, why not just separate them into variants. The ones we have now can have their damage lowered to better fit anti-personnel purposes, and introduce higher damaging REs intended for AV use at the cost of longer arming time. Flux grenades on the other hand have no reason to cause both shield and armor damage. That type of tweak would just make shields more in superior to armor. Considering now not only are your shields deactivated for 6+ seconds, now you're also short 10 - 30% of your armor on top of that? Might as well throw one of them REs down at their feet and save them the trouble of getting wrecked by a flux grenade.

Hey man when you can simply drop an RE and kill everyone within its blast radius in a little over 2 seconds that's a little ridiculous. We should have a bigger window to escape instead of spending those two seconds of arming time turning our fatasses around and preparing to run. Its impossible to escape them in anything less than a medium suit, yet kills heavies with ease. Nobody wants to nerf its arming time so tweak its damage so heavies can actually survive one blast, that way you can use it as a crippling tool rather than an easy win button.

Hence why I said to also introduce a breach variant with high damage, and longer arm time. Solves both problems by dividing the uses, don't know why nobody else suggested it.

You nerf RE damage, or increase their arming timer, you make them useless against tanks. REs take a LOT of skill to use effectively. They're certainly not more of an instant win button than rolling around in a proto heavy suit.