The point isn't that you might as well not use your abilities; the point of Trickle is to make you more conservative with your use of them. Let's say usually you might use your grenade as soon as it charges to take out two or three enemies, right? The idea behind Trickle is to force you to carefully pick the right time to use your grenade, so as to get the best use out of it. If you were complaining about a modifier that just completely removes the use of abilities, full stop, then you would be making more sense.