Yep, I know, this is in my own self interest but I think it would be potentially valuable to all players in a game that has a donor in it.
Give donors extra weight in the repick process. Just one or maybe even two extra votes worth of weight. I can't tell you how many games I've played in lately where the host has been AFK and we can't get them repicked because other players don't understand how or are also AFK. Inevitably everyone has to leave and start a new game, which during the slow parts of the day can take quite a bit of time. Doing this would also help combat troll hosts.