Its not that firebolts are op, because they aren't.....it's the fact that they leave you vulnerable for so long, giving the enemy a great chance to kill you considering they can see exactly where u are, and you have to wait a while before you stop burning, then wait for your shields to recharge. Wombo Combo is tough to fight, but it still gives a chance to escape as long as the grenade AND the smoke doesn't hit 100% on. So in point, the grenade isn't the reason people are asking nerf, the reason why people are frustrated is because it leaves them vulnerable for such a long time allowing anybody who sees them to practically kill them with 2 shots.