Firstly, let me just say that this map is AWESOME AS ALL HELL. It was very challenging but not impossible and had enough custom content to keep me interested for a long time.
But as much as i like it it still has some issues, the first and most obvious one is the weapon balancing/Missing sounds/sounds not playing at right time/No muzzle FX. I don't know if you edited the damage values for some guns or made the zombies stronger, but it feels like the MP40 and STG take an entire clip just to kill a single zombie. The upgraded SMG near Jug does an insane amount of damage unupgraded, but when you upgrade it it becomes total weak sauce with a way too much ammo. The upgraded Thompson didn't have any fire affects when you shot it, so it just looked derpy whenever i was using it. These are only a few of the issues that i found, there are PLENTY more.
One of the slanted brush in the starting room has a very small(but noticeable) gap
the elevator and "The Tour" both have issues where zombies can clip right inside the script_brush/script_model. I think they should be killed if they touch either of them while moving, otherwise it looks derpy.
And lastly(and i know i've already talked about this before), Double Tap 2.0 isn't DoubleTap 2.0. Yes, you can potentially increase damage output by 2x per bullet, but thats a
chance for BO2's Double Tap and is not guaranteed. The map's DoubleTap 2.0 setup guarantees 2x damage output, therefor it is not DoubleTap 2.0. It would be MUCH more fitting in my opinion if the damage increase affect was made into a separate perk than combined it with another.
All in all i never found anything gamebreaking which is real nice, i just wish the Beta testers did a better job. A lot of this stuff i noticed right away on my first playthrough and was easily noticeable.