It's not that I'm against it, but I just think there are easier ways to solve the given problem then to start calculated every users moves and time limits on a server which can barly keep up with what is on it.

The Given problem: "Fast" users don't like players "slow" users. "Fast" users do not want to pick low-time limit games (like 1 day per move, or 2 days per move) in case something happens, and they are not able to play.

Solution: I believe it would just be so much easier to impliment something like auto-vacation day if a time limit is near, then to do all the extra calculations. (I still have not heard that this solution would not work from anyone.)