to be fair RTW wasnt in a good state either when released under activision and they had a 3 patch policy!
I dont remember RTW being all that buggy but then it was a long time ago I played RTW.
With the first patch and a few simple mods RTW 2 is actually very enjoyable.
When in cinematic view the graphics look better, but then total war games aren't about graphics they are about building your forces, protecting your settlements and this game does it very well - as per usual.
The battles however are over very quickly, they or you can soon route an enemy, even with mods but I'm sure over the next few weeks it'll all be patched up.
I'm enjoying the game, problems and all. Dropped quite a few hours into it already, since this the first total war game i've played since RTW soon picked up the idea and was soon winning huge siege battles..