This was, of course, before Sonic Mania came out, and like... as this game's resident superfan on this site, I'd like to say that Sonic Comparisons might not be so favorable any mroe when held sid by side. Freedom Planet is it's own game, and I'm happy to see XSeed pick it up!
I'd say folks should still give this a shot. it's it's own thing. a high-speed action game with a focus a bit more on tough but fair boss fights and being able to have platforming action that feels a little bit more on-point than when Sonic has to slow down for that sort of thing. it's got elements from all over, and... if you couldn't tell, I'm still over the moon with Freedom Planet and it's very rough indie charm.
I do wonder if Stevie and the folks at Galaxytrail with this publishing deal are going to get some help releasing the content that they were supposed to release for the kickstarter but realized they made some clerical errors that lead to the stretch goal stuff having to be left in a beta state?