Improved in a way that had input lag issues at launch and now has better input lag than basicaclly all their direct competitors. Had connection issues, matchmaking issues and other server issues at launch that have been fixed. Added 22 characters (more coming next week/month), a ton of stages, costumes and colors. In addition to the MK-like story mode added the biggest ever arcade mode ever with 6 paths (SF1, SF Alpha, SF2, SF3, SFIV, SFV, each path with an different ending for every character in addition to more than 500 unlockable illustrations for the artwork gallery), remade their survival mode improving the issues it had, added weekly missions and weekly challenges to unlock some extra costume for free, added a customizable dojo stage and many other things.
Soon they will also add an online Tournament mode that it's going to be the most ambitious and most complete in FGC history.