NGL this is a lot to ask, especially considering the map was just finished a few months ago, and most of the changes are mainly aesthetic in nature. Not sure how much you know about hammer, but this is a ton of potential work for not that much of a payoff.
That being said, *if* the map is ever edited, there is a lot of dead space that isn't used, like the area east of Aurek and east of the main base, the wings of the lobby, and the third floor. It would be nice to have a reason to use these areas (or in the case of the third floor, you can always just remove it, or at least get rid of the guardrails so GMs can spawn NPCs up there or something).
I think updating the map would be nice, but ultimately right now the dev team should probably be focusing on more prevalent issues, like the event server and the weapons base.
**EDIT** but for real can someone fix the fucking nodraw textures in Citadel and under the base gate? It's so annoyyying.