Exactly. Improvements are bland and uninspiring. Bonuses of national wonders are tiny and not worth a spit (Ironworks +20% bonus? come on...). Buildings take so much gold and give so little in return that building even GRANARIES is a waste of time, only the gold boosting ones with a million of trade outposts (the only way to play this game, anyway) are ok. Unimproved tiles give almost as much as improved tiles. Science can be obtained only one way and there isn't much to do to improve it.
Cottages might have been "overpowered" in Civ4, but here... what's the point of building anything other than trading posts?
Cottages might have been "overpowered" in Civ4, but here... what's the point of building anything other than trading posts?