Kakiu are taking the 3minute suggestion too far, like i said, each point on each map should have a timer best suited to it.
defenders should be rewarded tho imo.
Instead of reseting and starting a new round after every failpush onto last i'd rather try to fix the map and make both pushing into and out of last possible.
The reward for defending last should be the possibility to take 2nd back and not getting a free new round after you got pushed to your last and defended a point for the first time that round.