hehehee... Admin sure loves teasing. Now, for my input, AKA 'shooting in the dark'... please excuse me if something sounds like it's more of a suggestion (more like wishful thinking) than just a guess... ^_^;;
MON 2? It may help a bit with RMS ops... but not something I'd be excited about.
ISS interior? That'd be sweet... though I still have severe problems going down the flight deck-mid deck ladder while doing a SPACEHAB mission...
NASA chatter? That'd also be insanely sweet, but I think we can do better than just copy-pasting NASA chatter and actually do great comms ourselves (obviously using NASA chatter as reference)...
Following SRBs to water impact? That'd be cool, and IMHO the feature with the highest possibility to appear, since Ares 1-X was practically about that at the end, so I believe the framework for that's done. And it'd be funny if viewed during the "SRB-abrupt deceleration" bug that occurs after you view the Ares 1-X mission and then start a regular shuttle mission afterwards.
Shutdown procedures? Yes, please. I would love that. ...but then OPS 9 would have to be emulated... so I don't think it's likely. That and the convoy...
Admin said it was mentioned, so I guess hearing the APUs starting and puffing along, the actual sound suppression system blasting water into the trenches at T-15 (and the loud whistling sound associated with it starting at T-15, not at T-9~8), the APUs sound after wheelstop and a lot of other things I'd like will not come for now. T-T;;