We played your map awhile back and I've been meaning to do this but forgot. I just ran through your map real quick to refresh my memory on some things. I have a few suggestions, but I want you to remember this is just my opinion. And I'm not very good at drawing in a 3D space, so you'll have to bear with me
So while playing your map I felt there needed to be a route going through this building. Your map is similar to Viaduct in the way you have to go through the middle to get to the other side (unless you want to take the route underneath, which I'll touch on later). Here are two ways you could go about this:
Another problem I ran into was this displacement. I suggest you playerclip it something similar to this so players can walk smoothly on it.
You have this crazy height advantage in this next screenshot I feel needs some fixing. A soldier or demoman can get up there and rain down projectiles on the point without any way to really punish them. They're able to drop right off the edge onto that medium health pack and then jump back up there. I suggest maybe adding something up there opponents can get some splash damage off of.
The last screenshot I have is one of the spawn exits. I'm not a big fan of dropping off of something and being unable to get back into spawn. Please figure out a way to utilize both doors.
And to wrap up this post I'm going to briefly touch on the route going underneath the map. It feels really disconnected from the rest of the map. The only reason you ever take the right route is to use that tunnel. You have medium health packs placed right outside the entrance, so I don't see much point of having the large health in the bottom. Adding a path through the building in the first 2 screenshots might help with this problem.
Hope you'll take everything I've said into consideration. Once again, it's all just my opinion and I am by no means an expert. It's your map, so it's ultimately going to come down to what you want to do. I look forward to seeing it in an upcoming gameday though
Best of luck!