Having not bought a FIFA game for a few years, I went from still playing FIFA 09 on wii, to FIFA 12 for wii, and I have to say I was disappointed. The game has apparently had a different development team for the Wii version than for other platforms, and they clearly went down the misguided route of trying to make the wii version a more fun and friendly version for kids and families, as they have decided these are the people that own wiis, forgetting of course that the people who buy FIFA games will expect a proper version!
Comparing '12 to '09, I've noticed that lots of features have been stripped, the control system has been simplified; removing the point-to-pass system that made '09 interesting and made good use of the wii's capabilities, player ages have vanished from most parts manager mode as if irrelevant, manager mode is now limited to just 5 seasons, there is no longer an online play option, making transfers has been simplified to a childish auction style process, in which if you attempt to bid for a player; then that player is automatically sold; either to you or another team -bizarre.
The game also seems to have become far too easy - some modes don't even seem to have different difficulty settings.
There are some new features such as the streets to stadium mode, which is fun, but this seems to be at the massive detriment to the regular game.
Still a fun game, but all in all a very disappointing step backwards. Should I buy another FIFA game, it won't be for the wii.