Munchkin plus Unnatural Axe has a decent balance. Adding Clerical Errors to the first two dilutes the race and class-specific cards too much, so we took it out of our deck. Without Unnatural Axe, Munchkin plus Errors would be okay.
I sold my copy of Switzerland to make room for the India/Switz expansion...
I've really enjoyed playing TTR:S, but a couple of features have irked some of our players: 1. The country tixx are too powerful, making drawing tickets too good and luck-driven. 2. Many of our games have come down to face-down draws to get a single colored card. Restricting wilds to tunnels balances the tunnels nicely, but creates other problems
For the most part, these can (and have) be house-ruled, so my rating is a bit higher than as-published