Dude, for a first draft, i really dig the mid layout, though it is a little simple for a casual match. I can see a tunnel/room underneath point working well. Maybe a full health pack with a death pit around it like the mid of cp_sinshine? Also the flank routes are really big and empty, but i can see something like a catwalk working well in that area, or just making it small like the cave route in pl_swiftwater.
As for the theme, I love it, can't wait for you to elaborate on it, we need something to compete with koth_brazil lol.
Constructive criticism:
- Adding block bullet brushes instead of player clip brushes on the stairs to prevent explosions to be absorbed by the stairs for consistency.
- Some height around point might do some good.
- Spawning from two similar spawn rooms facing different directions is a little jarring, differentiating spawns and making it a little clearer to know which spawn you're in would be good.