>>309683392
There are several little holes and gaps but most of my screenshots of them didn't save. Also a few spots that my nades did weird things on.
Performance was worst for me when facing forward in T spawn, bad enough to tank my frames even with no teammates onscreen.

There's no need to get total coverage on the climbable ledges, just put the ladder volumes in places you think will be high traffic and fill in any large gaps.