Very limited online capabilities, certaintly NOT used to "patch" games after release
To be entirely frank here, Sega back when they were still in the console business were one of the MAIN pushers of online, before Microsoft came along. If any console should have extensive online capabilities it should be a second dreamcast. Besides, i think the "Draconian quality control" thing already fixes the problem of shitty broken buggy games needing to be patched after release to play right somewhat.
I have quite a lot of ideas for online capability, though
- Mods are allowed on the storefront and can be played on PC or Console as long as it meets the minimum requirements
- Online games of any kind may NOT ship without a server browser feature of some sort/the ability to create custom servers. Matchmaking is not enough! Crossplay and the feature to disable it is also a requirement.
- A spiritual successor to Net Yaroze (think dreams) where people can create their own games and submit them to the storefront as long as they don't contain any copyrighted material SEGA doesn't own
- Relating to the previous point, Since this is a dreamcast 2, it'd be nice for SEGA to get up and officially endorse and advertise Sonic Amateur Games Expo as an official event they promote on their storefront each year, to bring the event's attention to a lot more people and to get quite a lot of people excited for indie, Sonic and Sega projects alike.
- A whole slew of SEGA IPs getting their own dedicated online games just for the sake of it (i.e Outrun Online, Phantasy Star Online, another Virtua Fighter game, Super Monkey Ball online, etc)
- minimal DRM when booting up digital copies. The only DRM there is, is a check to tie the game to the console upon first startup. Therefore piracy is easily prevented since if you distribute the game files to another console, they can't work (unless it's a save file) Afterwards, the game should require no connection to SEGA's servers to be able to play. Piracy is inevitable but you shouldn't screw over paying customers as well.