Right, I'll shoot my slag and throw some roses...
First (non essential) problem: your .pk3 didn't match the .bsp file name, so it is bit confusion.

The map itself is, in texture work, excellent. That room with two bridges top floor textures, with distinctive lines is bit dazzling. Some lines connect to edge, some break line to floor.
Also, you made good work on that windmill, and the water wheel.

Default bases are rather easy to take, especially aliens. one tube near that twin bridge room, and two covering overmind. And eggs themselves are very vulnerable for coordinated blitz. And the route on twin bridge room and bases is quite fast. But this is only assumption.
Other than that, I have nothing else to say. And overall rating of this map looks good.