Not quite 50 yet, but one thing I've noticed is if we burst, we have to stealth otherwise we have no energy to continue fighting, even if we have the damage (lets face it, shoot first isn't needed to kill someone in a team fight scenario)
However, the KO nerf will see people ignoring it entirely, so all of a sudden people will be getting Shoot first - Nutkick - Backblast - Flash Nade - Backblast and die again, wont stop the damage just force us to take 2 seconds longer to kill people, and the team will still not react :X