Burst of speed SHOULD be a risk decision, it's a snare-breaking sprint with 0 cooldown for christ sake, if you consider that 'unusable' then my mental well being shouldn't be what you're worried about. With a high energy cost you'll need to preemptively pool energy before you yolo fuck off half way across the map. Then again, this might require players to actually manage their energy.
at start of mop bos removed roots but the energy cost was 60 and no one used it. they lowered it to 40 and made it remove snares, no one used it cuz its absolute bullshit.