Worst thing is, when the mob fall to the ground now, it looks like they fall on the back because then turn first, but that's not always true, it only looks that way, so when you go behind the mob after using Shoot First, you often get "Effect condition not met" because it only looks like your behind them.
They also removed the knockdown from the tooltip, so I think they slipped in another nerf here without telling. In a month, there is no knockdown left and in two month we get 3 min. cooldown on shoot first