There are couple maps that i think looks good to be added, some are base cs maps that are looking good for the server's gameplay
1.cs_assault
This map is popular on cso, and might even work for the current's server gameplay design, reasons are :
-There are good ammount of high ground location, tunnels, or open area for humans
-Maps are designed to encourage teamworks because sneaky zombies can enter from various locations such as the notorious tunnels or the bridge
-Spawns are fairly scattered, so newer players have chances of making it out alive from spawn instead of getting cooked with gung and rods
-All zombies are viable due to not really needing lower gravity skills to reach places
2.zm_anubis
It's 4.21mb and aesthetically pleasing, has surf pads and high ground. open area to avoid spawncamping, and lavas if anyone is careless enough, or maybe its not good enough because people might suicide intentionally, not sure if the server can handle the size
Link : https://maps.cs-bg.info/maps/cs/3472/
3.zm_assault_d3
If the original assault is too basic, this one is modified for zm mode instead, good ammount of parkour areas but not too broken for human to jump around either, and its a small sized map
Link : https://gamebanana.com/mods/87945
4.zm_deathalley_new_2
A small valley with okay jumpable spots, might not be as good as the other suggestion but its 3.73mb in total, with abit of usable sentries in the map