Just ran through it, and here are some thoughts:
The map is way too big. There are a ton of pointless open spaces on the fringes that are boring to look at and will almost certainly be boring gameplay-wise. The big field in the first area is a particularly bad example of this.
The layout is way overly complicated. There are ton of weird stairways, buildings, tunnels, etc. that are out of the way and lead to seemingly random locations. The player should have some idea of where routes will take them; this map has a ton of really long routes that drop you halfway across the map. The giant staircase monstrosity in the middle of the map is also a pretty bad idea. Nobody wants to walk up or down four or five flights of stairs. Nobody ever.
Trees in the combat areas aren't a good idea. The leaves block vision while still allowing projectile spam through. There is also a tree partially sunk into the ground, so a player could hide in the leaves and be completely invisible from outside.