Iīm not even using DeI. My statement was, many mods stopped working a long time ago so I patched my own mod collection many times and from quick look it looks like no big problems for when DLC will be live. I have already tried beta for a few hours. So I really donīt see the big troubles with mods you are speaking about. Iīm always concern more with new possible things than with old precisely because they are old...this DLC will probably bring back some modders to update already old stuff or create new one. My view is simply completely opposite to yours.
If this DLC is success then I see no reason why CA cannot do more with bigger budget next time. That is simple logic. Year ago there were no plans for this DLC yet now CA tries it. Empires Divided and Saga game *MIGHT* brings us more content before next tentpole historical game. If you donīt understand this logic I have sadly no idea how to explain it more to you... CA saw demand, they decided to try DLC, if success , then we might see more things/deeper things even for Rome 2 again. (Shogun 2 is older, Attila has less playerbase...so another DLCs either for Rome 2 again or Thrones of Brittania)
You should decide if these older DLCs were average quality or poor ones..cannot be both at the same time.
I simply donīt see it as worse to them so I will try this DLC. I read all things that should be fixed in Rome 2 and well they decided to fix Politics as one big down. So it is move in right direction in any case. If that is enough, that is question for everyone...but i would keep in mind that they had limited budget, limited time, new team, old game.