A forfeit is a sanction placed on one when the rules are not followed and the player is punished and as such has negative connotations whereas conceding is an acknowledgement of defeat and has a slightly less narky attitude about it .
Agreed. Very good point. If there is not an option to concede, in the coin rooms, or matches, there should be. If there is no way a player can win, rather than draw out the contest, and waste time (if playing for cases) or ball hits, a player should be able to concede, as opposed to a forfeit, and run the risk of being labeled in the forum, or elsewhere, as a quitter when, in fact, he/she was actually being considerate of their opponent.
I do not play in the coin rooms often, usually in the Showdowns. I do remember the old flash version gave the option to cc the match. If this new version does not, it would seem simple to add this feature.