Actually, no company has ever come out to my knowledge and declared that patching is illegal. All they are concerned about is whether you've bought their game!
In answer to the patch questions. There are a lot of new patches in development at the moment based around the mix patches and the new uniforms thta are being edited. If I were you I would wait until next week becasue htere will be the first big uniform patches available. Anything oyu get at the moment will probably be redundant by the middle/end of next week. Over 50% of the uniforms in the game are now edited and tested and by this weekend I'd say we'll be pretty much there. There have also been new boots designed and a few other stadium enhancements.