" it has been requested before, that there should be a way for players in teams to either make themselves available or not without having to leave & rejoin teams " : I totally agree with that.
And I'd like to be able to join several teams for the same game. Because when I like a game, I'd like to play it more often. I understand that it can make a problem when the 2 teams where you are play together, but in this case, only one choice would be possible (for the player) for example.
I say this, because sometimes you join a team, you play several tournaments and suddenly (I don't know why) many players leave the team and you're now less than 4 in the team, so you can't play other tournaments (because not enough players) and you can't leave the team for another because the tournaments aren't finished (even YOU have finished).
And we'll speak again about slow players.... (it will remember something to Gouwe gover and Gabriel Almeida - a discussion we had on another board).