Feedback time. Many images inbound.
It looks like you've yet to get to detailing the spawn rooms but this cow skull looks odd in a Christmas themed map.
Splitting up a spawn into different areas is generally frowned upon but I think it would be OK for this map. The main issue is that both spawn rooms only have ONE exit and no safe way to look out them without being in the line of fire. This leads to either one or both rooms being easily campable since players are bombarded without warning when just trying to leave their spawn room.
These pickups in the snow look weird, especially since the patch for them is ON the snow itself.
I can hide stickies in the trees.
No cubemaps.
Ok, so, A big issue with this map is just how long and narrow it is. LOOK at these sightlines. The last one can basically cover 2 points from one spot. It's ridiculous. That one at least has some semblance of a flank to deal with while the first two really don't.
The inside areas are a big dark at times.
The rust on this train looks odd compared to the bright colors used in all of the other models in the map.
When I jump onto this part of the train, it stops. This seems weird since I'm still ON the train but only the wagon counts as being the payload.
Clip them stairs.
Red sign in blu spawn, also one of the bobbles from a tree is clipping through the wall.
Another spawn with only one exit and no windows. Unlike the other spawn, this one only has one room and is in a spot that is ripe for camping.
Weird line here.
The white tank on the wall here just does not fit. It's a very different design than the much more cartoony and curved buildings throughout the map and putting them together just shows how different they are. The red on on the ground looks alright though.
Clip them stairs.
Clip them stairs, again. I can't walk up this top step but have to jump instead.
This is weird.
That's pretty much all the feedback I've got for now. I really like the visual style you're going for with this map but like I said before, it's very long and very narrow. There's mostly just one long hallway with a few side rooms which makes for crazy sightlines. I'm also not a big fan of the skybox as it contrasts too much with the light and bright colors used throughout the map. I hope this helps