I don't know if anyone has complained about the UI before, but sometimes I find it really inconvenient to find a stage I'm looking for. I think in the next patch they should group stages or at least organise them better. You could group them by series (e.g mario themed stages and zelda themed stages are in their own groups) or you could take the traditional route of dividing the new stages from the 'past' stages.

EDIT: I know the stages are technically ordered by series. I just want them to be grouped and visibly separate from each other.