Played about an hour as spy -
Massive lag spikes. Barely playable.
The "intel" is way too hard to get. 2 engies can easily cover the whole room. Hard to get an organized push all the way to the end as well, since some teammates want to stay behind and kill robots. Both teams having a permanent teleport in spawn doesn't help, either.
A demo can camp with the intel right after he/she gets it, since the tunnels are so tight it's impossible to get past the sticky traps.
Can't add anything else, because I genuinely don't like the gamemode. I figure it will get old faster than doomsday. Remember doomsday? Yeah.
Mid is wonderful, although the lower tunnel could have a better structure, a few more nooks and crannies for decloaking, perhaps.
The base is a hellhole, as stated above.
The tunnels are kind of silly, they mostly take you from one room to the exact same room, but 10 meters away.
A lot of people complained about the lack of health kits.
I feel the map would be much more fun if it had a different gamemode.
TL;DR - Doomsday 2.