I'm sure this has already been expressed at some level, but there are a bunch of missing SM features that are pretty critical to any sort of multi-human rp/multiplayer experience.
Transferring ships and commanders to aliens. (Ground troops have the option but for some reason these don't)
Critical if you have a merchant/mercenary empire that wants to sell ships/fleets.
Transferring tech (including racial techs). Super fun to RP 'licensing' engines or other components to other factions.
SM Wealth. It really leaves a giant hole. Without it, races can currently only trade in minerals, and without the aforementioned transferring of ships/tech, there's really nothing to buy anyways.
It's also nice to be able to 'buy' research labs and whatnot from the civilian sector.
Suggestion: Add a game option to toggle the tech bleed effect. It really kills competitive teching in a multiplayer setting. For example, why would a player research "Research Rate" if they are just going to bump up everyone else's tech as well? For most techs there is a work around to just remove the bled techs, but the Construction category seems to remember your highest ever level, so if you remove the 'gifted' Research Rate 240, the research rate doesn't go back down to 200.
And believe me I have tried everything to circumvent this. I tried to make three different 'races' of 'humans'. I tried to shatter the Earth and made 3 identical Earths, in slightly different locations, with different names. I can only conclude that the tech bleeding is linked to home system and not home planet or race. I'd really just like a toggle.