It's another Armored Core game, just like virtually every other games that came before it. You take what the previous game had, slap a few QoL improvements (like seriously i think the only big thing the series has added since the first game was the arena, and it was added in the second game), and you got a brand new game. At least this one had a few missions that felt a bit more unique than what gen 2 offered, and i like the atmosphere, but that's kinda it.. that doesn't mean it's a bad game, it's definitely a better one than 2/2AA but i'm starting to get tired of this series never really trying anything new, and from what i've heard this doesn't change until gen 4 sadly