Since you asked ...
The emotional reason? They bore me. Also, I fear change.
The intellectual reasons used to justify the emotional one --
- They add big, non-granular randomness to the game. (Don't you just love being New Sparta and then seeing the Biggest Military tile not in used? It's like rain on your wedding day). [It hasn't happened yet, but I'm just waiting for player A to win because B and C tied each got 3 VPs instead of B winning because he got 5 VPs.]
- They reek of chrome. I don't play Cosmic with Lucre, or moons, or reverse hexes, either.
- I happened to like the prior level of interaction, which focused on role selection. I didn't think we needed a whole lot of cards like "Mining Conglomerate," but now we've six of them in every game.
- They slow the game down.