Not really sure where I even stand on the grenade thing. They are a bit all over the place in power. Some go through walls and cover, some don't. Can't detonate combos at all except on health with lift. It is an odd hodge podge. And they were a lot less powerful when you didn't have grenade capacity gear.
Really I am not sure that no cooldown powers should exist in the game since the shared cooldown mechanic won't affect the classes equally. If they were all limited to soldiers, it might be one thing. But then again, giving them a cooldown like in ME2 didn't ever seem like the right way to handle it. It would probably be better if they were a much more scarce resource, where you only get the ones you start with and then an additional 1 from each thermal clip pack you burn, with no grenades from boxes.
Then people would QQ how Drell are useless, Demolisher would be a shadow of herself and so on.
then there wouldnt be any sense in maxing or taking grenades at all.
so many other skills and characters are OP'ed anyway.
then "nerf biotic explosions" threads would pop up everywhere because all biotic teams making all those booms on such short cooldowns would be the new "ruins the game" topic. especially since biotic explosions take the same percentage off enemies no matter the difficulty.
the point of the game is fun, if you feel overpowered and not having fun then gimp yourself if you want to if that what makes the game fun for you.
i dont need grenades to have fun, but i do have fun with grenades.
