This map has new and interesting ideas but there's a lot of problems:

1. This map is way too big, you will often be left waiting or searching for the last zeds in each wave

2. The elevators are a nice idea but why use them if they can only be activated between waves? Most of us are trying to get to trader pod, so if we even make it there by luck, we wont be able to use it since we will have run out of time.

3. The grass fields are a nice idea but its always a pain since its hard enough to see normal zeds but the cloaked and crawler zeds are invisible in that area. Much like the map as a whole, the area is too big.

However, it does have redeeming qualities

1. Nice environments

2. Decent concepts

3. Tons of locations for fighting off zeds for a unique way to fight each round.

My suggestion: The main change is to make the map smaller, it would at least make it easier to reach a trader pod. Also, add more elevators.