Awesome that you did that Wraith. Thanks. The reason I suggested a museum-like lobby arrangment is to shorten the transitions between areas. Just walk through a door essentially.
Honestly don't know how feasible the hangar would be. Webpage says 120 aircraft, vehicles, and boats. That's a lot of real estate! Might have to have a vending machine instead 
Love some of the suggestions that are coming up. Can you mock up a 3D space online somewhere? Something like Sketchup?
Was fun, 'Shida; you're welcome

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If anyone wants to tackle a 3D mockup, I don't recommend SketchUp. It's a great tool but it's for static modeling, even if you use its scenes tool to come up with different views of an object. You also won't have the interactivity that you'd want (like mouse hover points, hidden slide panels, etc). Rather, I would recommend something like the Unity 3D game engine (it's free) to mock up a working demo:
https://unity3d.com/get-unity/download. However, it'll take someone with coding skills to create something that is user-navigable, interactive, etc. to develop a demonstration. Not something I have the code skills or time to do.
All that said, I do think that mocking up anything more elaborate than what I managed (which was really simple and very rough) is probably putting the cart before the horse. HT and company haven't indicated that they're entertaining the wish idea, so that mocking up a semi-functional 3D example before that happens isn't worth the squeeze.
I have more than a passing involvement/familiarity with UX, so IMO a good game UI makeover ideally would involve one or more pros with UX/CX, game UI design, information architecture, universal design/user-centered design and usability experience working in tandem with the HTC software team. Given that Steam has or may skew HTC's understanding of their user-base given new users without this community's known preferences, it's a certainty (IMO) that they'd also need to sample the new user base somehow to get a better understanding of what Steam's users look for/want. So they'd need some pre-design/pre-dev user-oriented research into preferences and needs (statitistical studies and maybe even more eloborate stuff). In short, don't get your hopes up, guys

; to do it
right is a big deal and I'm pretty sure that HTC understands that.
Now, if I'm wrong and HT does want to consider this with attention to UX/UCD, I have many UX industry contacts in my LinkedIn network so feel free to PM me and I can put the word out that you want to talk to a UX consultant or add you to my network.
FWIW,