I like a lot of what's being done in this map. You've got some tricks that aren't in any other. Those iris doors are still crazy impressive, and the map just "feels" different from most others. It seems a little large, but many maps do on first impression until you get to know them. It needs some playtesting.
However, before there can be playtesting it needs some optimizing. I have a NEW system and I never get below 125 while devmapping on Transit, but your map takes me down to < 30 in some places. If I wallwalk around that new garden section, I can achieve < 20. Turning on r_shownormals shows a lot of things in places that are very far away, but still being rendered.
I understand the idea that things need to be playtested before optimization, but when most peoples' systems can't handle transit, yours is going to go slideshow in some areas and they'll just vote to insta-nextmap it.
In *most* places I get a solid max fps without issue. It's just a few certain areas where it tanks, and when it tanks, it tanks BAD.