Ok, technically there is already an indicator of how far you are on normal mode, but if you’re not playing normal->hard on each stage, it can become annoying to remember where you are, and referring back to your profile is a workaround at best. I’d rather be able to glance at the season map and tell instantly where I need to go. Admittedly, the problem is less terrible in s3 and s4 than in s2 where you could jump around, work backward or let your cat decide with stage you’ll play next on hard.
Yes, the stages have a 3/5 marking on them, but that is really hard to read on a phone display. A color change in the completed ring or an additional dot indicator to the side would be more useful.