Maybe Civilisation and Total War should merge into one ULTIMATE game! i.e. use TW for graphics/battles and Civ for gameplay/strategy.
I thought that after first playing Medieval II, too. For awhile I even found it to be more fun than Civ. Of course, I noticed the terrible diplomacy, as turfcat for one has mentioned - Civ was far better in that department. But the bugs eventually got to me - battling the Timurids in epic 8000-unit battles wasn't quite as fun when the game crashed 80% of the time. I was lucky in that the 1.3 M2 patch fixed that bug, but shortly afterwards I tried several mods. There bugs appeared again, and I came to realize that Medieval II mods were much less stable than Civ3 mods. It was around that point that Civ started to regain its position as my favorite strategy game - and for that matter, mods aren't even as necessary in Civ. The variety in the regular epic game is so much greater in Civ than the Grand Campaign is in Medieval II that Medieval II needs mods to catch up.
Not long afterwards I got Rome Total War. It was fun, too, but I found it to be quite similar to Medieval II. This made me less inclined to buy Empire, as I suspected it would also be similar. The reports of rampant initial bugs, which my MedII experience made seem very plausible, and seeing the dismal pathfinding in the demo, convinced me not to buy it. I haven't regretted the decision.
In some ways I still agree. The battles in Total War are great fun, and the strategy/diplomacy in Civ is doubtless superior. The graphics are also better in Total War - I actually much prefer the Total War map to the Civ4 map, but I also prefer the Civ3 map to the Civ4 map. But I'd want Firaxis to be in charge, as they seem to do better at bug-squashing and generally paying attention to the game engine (and even they aren't perfect).
Napoleon... I'm not boycotting it per se, but I'm in no hurry to buy it. When there's an Empire Complete pack (including Napoleon/all future expansions) for $10, like there was for Rome when I bought it, I might bite. I'll save my boycotts for games that either have totally unreasonable DRM (Assassin's Creed 2, for instance, although any other with activation limits counts, too), or ones that are considerably more "broke" than Empire Total War is. And those do exist. Mostly very poor console ports, but they're out there.