1.2 questions

So I just recently decided to start playing this again now that 1.2 is out. But i've been away from the MTW2 scene for a while and I fear I am not fully up to date with all that 1.2 has to offer even though I've read a little here and there.

I've heard that if we modded the game at all, 1.2 won't work. I don't remember if I did or not so I uninstalled and then reinstalled the game just in case.

Is there anything I should know about the patching process before I do it?

Is there a list of all the fixes/additions to the game?

Now that it's supposedly more or less fixed, is N/N a good setting to play with?

Thanks for any help.