I played on this map on the TF2Maps server, and the moment I spawned, frames were at a low. From the looks of it, you're more focused on detail, rather than anything that will help your map get better. I can't even tell if the layout is good or not, because you added too much detail, and no optimization (Which has been feedbacked multiple times). Take a step back from the artist platform, and try to focus on the layout. You're in a6, this amount of detail is usually found in late betas. On a smaller note, the title makes no sense. This clearly isn't an airfield, and feels more like a little town square. The only airfield related thing on it is the 4-5 planes in the back (Which again, heavy details in a6a are not a good thing. Please. fix it. It has promise, but it needs a lot of work
On a smaller note, the name always has been a placeholder, I've said that it was one since this map was created.