Feedback dump!
I just ran through your map and wrote down any possible problems I could see.
NOTE: In the end, everything is opinions
The last spawn for blue lacks a func_respawnroom and also has a busted area portal:
Easy to fix, not a big deal.
The area of the first and the second point seems a bit too large. Maybe reducing the length of first by about 256-384 units and lenght/width (depends on your perspective) of the second by 128-256 units. It really depends on what you'll place there (I'm talking about the second point), It doesn't need to be made smaller if you add a building or other kind of cover in that one open part of it (referring to the right of the third pic below).
The scout used as reference looks really small here IMO:
First feels too large:
Second feels also a bit larger than normal:
Speaking of second, you only have two doors connecting it with first. This can (maybe, possibly, theoretically) lead to a massive spamfest at the choky doors. Adding one alternative route should address that problem.
Pic:
Mid is alright.
[NITPICK] A thing i noted was that you only have two entrances to it, which is fine, but both entrances lead you towards the middle. You could open the fence (show in picture below) to add a third route once you've entered mid.
What I believe would happen ingame:
What I'd like to be added:
Also, the choky way into mid is very easily spammed (since it is narrow) but also one single sniper could lock it down because of this sightline: