Pugged this recently. Seems pretty great, but a couple of issues.
First, ammo throughout the map seems a bit limited. You have plenty of mediums at pretty good spots throughout, but the medium at the pipe near the middle seems a bit odd. I guess its some sort of engy holdout or heavy spam spot, but its really hard for sollies when they run out of rockets from the middle fight and have to fall back. I recommend some smalls on either side of the wood/pipe barrier, to give teams a little bit of an ammo hookup.
The hallway that goes to the medium at 2nd seems a bit awkward. You might want to use that to flank anyone at the 2nd, but at the same time you really don't want to stand there as medic, as you'll get some massive spam. Maybe make that hall into a room with abit more space? You can keep it a little more chokey by putting a prop in the corner, but just enough room to move around.
Last seems really hard to defend. The defenders all pretty much want to be in the lowered area, to keep people off the point, but if they do that they get spammed from five separate locations (the three small stairs down to the floor, and the two overlooking windows). Even if you use the back area of the point to get a little bit off the ground, the distance between you and the attackers is pretty significant, meaning your probably going to get spammed to hell and back before they even need to push in.