>>338360779
I played it solo on the market map. There are two others I didn't try.

First impression, the AI is still rough. It starts shooting instantly when it sees you and does so through any penetratable objects like the market stalls/tents. I started hearing shots before even spotting an enemy more often than not. They have increasingly better gear and extra variants that appear the further you get. I got caught off guard when one guy ran up to me with no weapon in his hands, I assumed it was a bug until he started screaming something and exploded. There are also dogs that suicide bomb a few seconds after death too but the navigation AI is pretty wonky on them, they like to take the scenic route around the map. The enemies all feel bullet spongy unless you shoot them in the head, particuarly the armored guys with shotguns.

The upgrading and weapon tree were decent, having the buy points move location does force you to move around the map. Unfortunately I found that running around at high speed was safer than trying to defend the buy zones, even with armor and HP regen upgrades. Limited ammo made my weapon progression quite slow so I found that the upgrade/perk that causes enemies to sometimes drop ammo to be extremely useful. It's probably quicker in a group.
The map was the same or very similar to one of the base game maps in the other modes and I found it a little boring. It's fine when you're sprinting around in multiplayer but there aren't many defensive spots that feel good to fight in. The AI don't really fight well in the maps anyway, they mostly just crouch walk towards your location and either crouch stop to shoot or charge at you while mag dumping. Sometimes you can see them try to run behind a corner but it feels unnatural with how it seems to override what they were doing seconds ago.

Overall it feels similar to playing the regular game against bots but there's some structure to when they spawn and what weapons you can use.