Looking at gameplay footage of SDT, I notice some levels seem to have quite a few "acts" which, while more the merrier, it feels like padding if I stay too long on a level. But as far as I can tell they don't copy-paste like what Sonic Colours did.
Indeed, if it's fun it doesn't matter how many stages they have.
Sonic Frontiers has a very few stages but I enjoyed them all since they are very wide, so may be I could enjoy Dream Team as well ... assuming they move to another affordable platforms later.