By what deffinition of TC do you guys use? Because to me it means you changed that game to a different era or time frame not covered in the original or to a fantasy setting. By that definition theres a few TCs for the empire-FOTS games: TWTEAW for empire, TGW for napoleon and ww1&s2 for FOTS (just noticed they all related to ww1, wtf). To a lesser extent foreign invasion(FOTS) is also a TC since western powers are invading japan or sekigahara campaign(shogun 2) this one since its a later time frame the vanilla by like 1 year, though it plays very differently.
What im trying to get at is there are still big cool mods out there for newer games you just have to like ww1

. Though medieval 2 and rome will still be the ones with the big TCs and overhauls (overhauls past medieval 2 suck, no offence) yet all hope is not lost, eh. CA even made a battle map editor for shogun so they may release more useful tools for modding soon, like a campaign map editor. That really whats holding us modders back, the lack of changing the campaign map and adding new animations limits us to TCs and overhauls that use existing maps and animations (for shogun 2 model since nobody bothers to make a model converter anymore).
In some ways moddings advanced alot, TGW 5.0 will have working tanks for christ sake! People working on empire are slowly advancing on modding the campaign map and warscape modding is easier to install. Another pro warscape has is going for it is making new units is quick and easy, for example I made 70 units inside 50 hours.(30 variant models) though to the average joes a opinion I guess not being able mod the camapign map and add new animations out ways that.