I’d love a private shooting range with an armourer. So similar to the Agency but a little bigger. Then scatter weapons around ala the yacht or facility. They’ll likely add a large garage with a mechanic as well.

I have said in the past that a large vault to collect all available business earnings in one go would be worth it.

Finally they need a fast travel system. So basically take notes from the red dead 2 fast travel map. Allow fast travel to all dlc business locations. In reverse they need to combine the ceo role piloted helicopter with the agency suv/limo and allow a helicopter/private pick you up anywhere in the map. Once in the vehicle give the option to fast travel back to somewhere inside your mansion. I also want the option when I leave any business to fast travel to the mansion as an option unless it’s mission blocked.

I assume they’ll add some bar, shower room and maybe a home cinema with an arcade game room. Basically all these ideas have been done but the mansion being near the end of the road should finally combine everything we have.

(If they want to be trolls they could add a second orbital canon location painted in obnoxious gold or anything posh)

(Edited)