What If a boss camps in someway?
What if a normal does? Think it's easier for any one of them to hide than it is for the boss. Chasing down the last normal with 30 seconds on the clock and having no idea where to look is really frustrating.
It should end in a tie and everyone still gets points for trying.
Nobody gets points just for the round ending. Feel free to pretend it's a stalemate if you want, though, since it wouldn't make any difference.