I got to say, as a fellow Zero player, gameplay is wearing on me too. In TVH, sniping still 1hko's, but melee's no longer viable, and fuck that retarded jack of all trades, sucking at everything pistol tree. And by and large these DLCs have had huge numbers of crit spots that are: armored, rear mounted, or just ridiculously tiny on a wildly moving body part.
I still enjoy the visuals and storyline, but the gameplay is going south.
As for this newest DLC it seems like they expect players to go through huge amounts of ammo in most fights (as per the 80000 ammo crates and jars everywhere), but on TVH, if you aren't running bee+sandhawk (or some other ridiculous combo) and you can't insta-kill most things, then you're dealing with large numbers of kill you in one 1 hit mobs, homing projectiles, runs-faster-than-you-AND-warp-jumps onto you; all fought in tiny little arenas with very little cover.
Of course, if you ARE using some of the broken combos, then your skill trees, action skills, and character choice don't even matter anymore.