What about OCD category where every golden coin has to be collected at least once?

I would use those icons to watch the runs.

There's a little problem with watching runs. Before you actually start watching the run ,you can't see if the said run is pre-recorded or streamed and whether it has no commentary, post-game commentary or useless (live) commentary.

It would be nice to have this represented as icons or something.

I think this needs one. 100% means killing as many enemies as possible (unless they don't count towards the enemy count) and finding all the secrets.

100% + all applauses?