I've yet to play a legitimate game of it. The map and idea is really cool. Unfortunately I repeatedly get put on completely stuff teams. To where it feels like we have neither offence or defense (like I end up not being able to leave the base at all due to 4-6 people coming in and no one to oppose them.)
The worst I've been on had 3 engies, no defence, and no offence at all, we lost 7 to 300 (keep in mind they never stole point.) Literally 2/3 of their teams would come in no problem.
That happened to me on the last round I played, a Heavy, Medic, Pyro, Demo, and Soldier were just freely roaming our base between our C bots and vault, so I switched to Scout when they hit 270 and ran over to their vault but I touched their core literally one second after they hit 300
Funnily enough I sat there and stayed alive in humiliation and it actually started picking up the cores when the map was getting ready to reset, confused a few people