It happens more often than not,
I join a single player in the lobby waiting for more players,
then all of a sudden he hits "tee off" without asking me,
and now when our round completion is ranked, it means you're stuck
in a round with 1 player, even though you wanted 2 or 3 more players.
what I'd suggest is adding a small 10 second countdown clock
just like the one we have to set up our clubs.
a 10 second notice that the tee off was clicked,
so that we may leave before the game starts without penalty,
should we choose not to play for one reason or another.
if a player leaves during tee-off timer,
the tee off would be canceled so to give the host the option
to replace that player, or to hit tee off again with remaining players as is.
I'd love to see that AND the % filter added in the next update