Honestly, I liked Rome II, even at release. While I would have preferred it to be released in the state it is now, it's a fine game on its own. And honestly, I think its silly to say that Total War is dead because they decide to make a side game in the series based off of Warhammer.
Especially since Mike Simpson, Creative Director at CA, recently said in an interview that the main Total War team will always be making single player historical strategy games.