I'd actually love to start working with hammer, and if you would work with me in that, that would be epic. However, you have to realize that I'm looking at these maps from the side of a player. And specifically with that dark room, I jumped in every corner, turned up the brightness on my monitor, everything. I spend just as long looking at this map as I did with jb_moonjail, even though the map is incredibly smaller. I just can see having fun on this map with the way the server is setup on SG. SG is all about rebelling and CTs maintaining control.
Let's talk for a minute about stats and logical thinking. I've played with you, not many, but enough times to know you're quite intelligent.
The highest Win/Loss ratio in favor of CT side of the maps in current rotation is jb_spy_vs_spy_beta7, with the CTs winning 31% of the rounds. Now, I would get 100 people to tell me how much they like this map and crunch the numbers there, but I don't have access to an easy sample size. However, I could tell you that not many players like the map. Jb_spy_vs_spy_beta7 and jb_greytown have many things in common. Limited amount of vents, few placed weapons outside of Armory, linear map design (Go here, do here, come back, go there, do there, come back).
Players like maps where the Ts have options to rebel. Lots of options. Hence why Razer/Vipinthemix do so well. Even CT players like myself enjoy them more because they present a challenge. I looked through this map, and I failed to see the challenge.
I invite you to purpose a counter-argument, in which we can both conversate and even... just maybe... bond.