So, here's my feedback:

Bugs:
- (51, 897, 64): You can walk through the barrier, don't think this is intended
- (-1873, 890, 173): You can't throw grenades though the little cracks, this does not happen on the side entrance
- (-2415, 424, -41): The dirt is disappearing at certain distances (tested on low settings)

Bombsite A:
- Remove the glass from A site roof
- Add some cover on the right of main T entrance
- Lower the entrance, getting on the boost is pretty much impossible because you get taken down really easily

Bombsite B:
- Add de_nuke-like bombsite A roof windows so T are able to play smart smoke/flash tactics

Change:
- Corners like (245, 1209, 3), (751, 479, 10), (-2375, 928, -63) have to be rounded out so the gameplay doesn't seem like you're playing in a big square
- Corridors/areas at (-1300, -1491, 123), (-2077, -888, -45), T spawn, (511, -450, 32), (-210, -666, 0), (-1492, 124, -127), (-1031, -991, -199) have to be tighten up, they seem very empty because they are so wide

Other:
- Need BG sounds
- A lot of places that look like you can jump to but you actually can't (one at T spawn)
- Some materials sound confusing