I don't even know what to say. Rome 2 makes a good case for being the worst iteration in the series in its current state.
The game borders on fundamentally broken from a technical point of view - the graphics look like something straight out of 2005 and yet it runs like complete and utter garbage on high end machines. It's riddled with bugs like the campaign map completely desynching in multiplayer and the issue remaining unresolved upon reloading the save, partied-up team-mates being dropped on to opposite teams in multiplayer as well as countless animation bugs like unit animations moving at 1 fps while the rest of the game runs normally. The battle AI is some of the worst I have seen in a TW game with entire infantry lines running off to follow a single cav unit that is harassing them and the like. The balance is also utterly screwed with Rome being by far the best faction in both campaign and multi since they have the best units in the game and can get vet legionaries by 254 BC in the campaign. Oh yeah, and speaking of multiplayer, we've now inexplicably returned to the bare-bones multiplayer of the first few TW games with the avatar system, veterans and all manner of customisation completely stripped out.
As someone who played hundreds upon hundreds of hours of Shogun 2, I haven't been this disappointed in a long time.