In-Game Team Right:
How about a rule that when players go missing (disconnected, leaving), then a total of 5 minutes pausing per match is available (doesnt matter how often they disconnects/connects, join, leave, the time counts until the player is completely joined in game and ready to continue playing again), then the other team can enforce no more pausing possible if they want. Just giving them a right to take. The team can of course doesn't have to choose that right and just keep waiting.
So we keep a good time frame as valid for playing if the other team wants.