The multiplayer piece is night and day compared to Minecraft. Doing any kind of social gaming in Minecraft requires a sysadmin setting up servers and upgrading Java plugins. It's a double benefit because game creators don't have to reinvent the multiplayer wheel. I think it's a brilliant setup and why my kid prefers to play Roblox with her friends instead of other socially fragmented games.

Edit: and don't even get me started on the Bedrock/Java Edition schism!