This map has good scaling and does is well laid out, implementing height variation well. I'll point out the issues I found with it from the perspective of a blue player.
I believe that the 2 doors immediately in front of spawn and to the right can be combined into a single larger doorway. Also immediately outside of the spawn room is a lot of empty space. You could probably use this for something, if you have anything in mind. Continuing on, after the ramp up to the left side is another set of 2 doorways that can be combined into 1.
The exits to point for the left side hallway feel a bit narrow, adding some room would be nice, though you should consider how that impacts sightlines.
My biggest issue I have is how the roofs on mid aren't clipped off, and how close they are to each other. Soldiers would find it very easy to sit up there and constantly spew down rockets, which I'm assuming is why there aren't very many ammo pickups around. Clipping the 2 side roofs off and having the point's roof a bit more flat to prevent soldiers from poking in and out of cover could solve this issue. I'm assuming that because there was nobuild in an earlier patch Engies were an issue as well.
Ammo and Health placement seems sparse around the mid point, adding some medium health and ammo packs would add length to fights over the point.
There's also a weird draw bug moving towards the hut with the medium health and ammo pack on the right side.
Overall I believe you have a very solid map so far that can be built up into something really fun.