While I understand your position, I as a player I wouldn't want to see my game broken up to start another game (especially a shorthanded game.

On the other hand the 1-3 game probably wouldn't break-up from the loss 2 players (depending on time of day).

If this is the time of day when you expect more players to start rolling in then they probably should have started up the NL game.

But if they are not expecting more players to being coming soon starting your game may cause both to break.

If they open the NL game they now have a 8 handed 1-3 game and a 6 handed NL game. now it doesn't take much to happen for both games to break. Two guys who are buddies in the 1-3 game leave together and another player decides to take a long cigarette break/walk around the casino for 45 minutes -- now someone decides they don't want to play 5 handed game gone. The NL game is already at risk 6 handed and at any time a player can get busted out and leave.