Honeslty, I don't think you need the 500-600mb of assets but I'll try it anyway and report back after I've played.
I'm pleasantly surprised, this map has one of the best tries to capture a horror vibe. The rush of the zombies, the sounds and voice acting (minus the mics used for the voices because they sucked) really help the thrill of the map so I was wrong about the assets. But as I guessed, the guns are kinda pointless, some are nice to look at, they're mostly all well animated and have good sounds but the starting pistol has awful anims for high FOV play. Though, they're all too powerful which make the running zombies too easy to slaughter and for you to survive, along with the huge spacious map, it leaves me wanting more zombies, more dangerous. I dunno. The map is great, rough around some edges, but it's huge and there's lot to explore without having to buy debris, I like it a lot, it also feels like nacht der untoten maps for some reason which are my favourite type of maps.
Anyway, that's my take, good job.