Well, I don't like the idea of:
'*** got the flag' and
'Flag captured by blue team' in the space of half a second.
Make it some sort of semi-escape route. Not all the way, but maybe up 1 level...or 2.
yeah, I was going to do that.
but if it's turned into an escape route, teams could have a major advantage. the defending team could camp right from above the exit and shoot anyone who comes up, and the attacking could just as well go in from the top floor, take the flag, and shoot right back up. if there is another way, it could work though.