I like this map as it is. Yes, I die, a lot... but I have fun in there.
I do think it's entirely possible for the underdog to make a good comeback but it requires teamwork. Sometimes hard to come by but I have no doubt a bunch of eGO's coordinating in vent can get it done.
From the bottom of the stairs, on each side, grenade launchers can take care of the opposite corners up top while a group rushes in the middle to set up position.
From there, move into the corners that had been nade spammed. Timing would be key.
Just a thought, and at the end, we could all put on 1980's shades, bite on a half-smoked cigar and say "I love it when a plan comes together."