The point in cp_well is also like 128+u's above the ground, which makes it harder to spam down.
Something I think you should do is raise the point up and nestle it up against the wall opposite the main entrance.
Also, I noticed all flank's, whilst being diverse in location, area all along the same wall. This just allows snipers and wranglers and lock down the entrances. I think that the final point just needs a little bit of a change, and then I think you can call it "good."
Oops. Maybe I should've waited to give you that info after the endurance test. Oh well.