I really don't see what the big deal is. You have two kinds of DPS Merc, both rely on a single skill to buff the others. Option 1, go Arsenal, less mobile, more direct damage Option 2, go Pyro, more mobile, more damage over time Compromises have to be made. Pick what you like best. Animation and sound FX will not change the fact that an Arsenal merc is rooted during his or her inductions. Will still be a "clunky turret".