I just installed pioneers in Easy Debian which worked fine. In wide screen mode even the client's interface looks quite ok. At least it fits fine on the screen and the game board has a quite decent size (as much as it can be on a 3.5" screen).

The server's interface doesn't fit on the screen since it's aligned vertically. One can still start and stop servers but once you moved the window to a position where you can click the start/stop button you can't reach the upper half of the window anymore without tricks like using wmctrl.

Since I played Settlers of Catan only once about 10 years ago I can barely remember the basic rules which means I'm not able to test actual gameplay. I think it's doable but you'll need the stylus and I don't know how much fun that will be.