Looks much too visually noisy. Very pretty to look at, not so good for gameplay.
Love the level though, played it in it's early days and enjoyed it a lot, well done.

how has nobody posted this masterpiece yet https://www.youtube.com/watch?v=42QJWRATuaA

1. Your map isn't using an actual skybox, you've boxed the map. Do not do this. Look up beginner tutorials on how to make actual skyboxes. To see why this is a terrible terrible thing to do, turn on mat_wireframe. You're rendering the whole map at once.
2. You seem not to have Areaportals or any optimization. Once you have added an actual skybox, do this and you will see instant improvements.
3. A little overscaled in some areas.
4. Too many entrances into last.
5. Unseen textures aren't nodrawed. Do this to improve FPS.
6. This map is a mess of doors. Look at 'good' maps, they hardly use doors at all.

Process seems to be the most balanced for all classes involved, if not a little bit binary (Soldier sitting in IT, Combo at Spire, and Scout watching Sewer is an example of what I mean) and that isn't necessarily a bad thing.

Badlands is the high-level paradise. every move you make needs considerable thought, and you can't just binary hold most areas, which allows for fluid gameplay. Another thing I like about the map is while every class has it's place, the 6v6 classes are definitely favored. Would definitely be my #1 if I was better at the game.

Viaduct is a whole other beast entirely, and is very very scout/demo focused, switching out a roamer for a sniper seems to be where it's at for this map. It brings a feeling of expendability into the game, where losing a player may even be advantageous just to gain the point or push the enemy back. Also there is nothing quite like racking up amazing kills on the hill in overtime.