Erik,
I wouldn't be able to advance to where I am right now (a high begginer) without some real repetition and this change is quite discouraging. For me the repetition allowed me to slowly progress ceratin aspects of my game and finding my repeated flaws that I need to work on while seeing where I stand in relation to other players with a real metering system. Sure, for a seasoned player who already managed to understand how certain positions control the middle game and endgame it seems illogical that someone will play the same color, but for me it was the only way to progress and find my mind flaws. Unrated games take away any edge from a game, so that suggestion seems to defeat the purpose of learning to handle pressure as well as the errors that we make. It also promotes quitting when things are not great for you and removes most pressure from your counterpart.
Chess.com should allow for all kinds of players IMHO and not limit us to challange friends with the colors we like... if someone doesn't like playing against someone who prefers to work on a certain color he can easily abort. The advantages here, where newbies have a chance to learn through repetition and exploration (changing color really breaks the chain of thought and familiarity), is a great promotion for those people, myself included to pick up the game.
Perhaps this limit should be imposed on higher rated players who are not beginners.. that WOULD make sense to me. Otherwise, the change is only good to already experianced players and to deter/handicap new ones from actually improving to a point where they understand more than an intuitive 4 move play.
I don't think it's a good idea. For instance, I want to play against a friend KG only as Black, because that's the situation I encounter KG, I never play it as White. We match perfectly, since his main weapon as White is king's gambit, while I've always found quite difficult as Black to defend against White's fierce attack. I don't see why this should not be allowed.
My understanding was that for direct challenges (i.e. to a friend) and unrated games you're still able to choose your colour so you should still be able to do this.
correct.