Assassin Jump Dash. It could just be a means to do some damage to a constantly jetpacked Pro, or it could possibly be allowed to lead into an assassination as well. It could also serve to jump over freeze traps, since the assassin has no way to remove such a trap.
You mean like Using the lunge while mid air? You can jump over traps if you sprint, assuming the sniper doesn't have them almost overlapping. Well..even then it can still be hard depending on location and placement. Hitting pros jetpacking would be easy if not for the fact the assassin can't seem to swing her dagger/katana while in a jump executed during sprint.