[xXOpkillerXx]

There's really no point in adding visual clutter in gameplay UI unless it's for things that are relevant to something in the game. Flags do Absolutely nothing in FFR except... well... being there in the song selection menu and taunting you. You unlock nothing with flags.

That being said, SDG has been argued to have a completion bar in the profile page. That would make the SDG color on the combo relevant.

You could also, as mentionned, have a color for PB raw goods count. The reason why that's still useful even with raw goods autofail is that some players wont use autofail because it can develop mindblocks if failing multiple times in the same spot, or simply because they'd rather play songs fully anyway.

Finally, not every "relevant thing" in the game is of interest to everybody; having these be "disabled" by default is necessary.