make the round timer 3 minutes when you cap a point (thats enough time to get uber, exchange ubers, and then get uber again for a second exchange)
instead of the round restarting when the timer runs out, whoever owns mid gets a round.
whoever owns mid also builds uber 10% faster
winning by capping their last point gives you two rounds
this system would make tf2 a lot more fast paced and fun to watch/play i think