The problem with adding Loved maps though is that at any time a map may become unloved because the mapper changed the map

The star rating idea is really nice, seems hard to implement into the leaderboards without it getting too cluttered though

How do you measure loading times, though? Also, there is a 100-300ms random delay every time you load a map programmed into the game to combat macroing/dual screening, so a huge portion of the run is RNG based. I found myself resetting frequently at the beginning of the run when I noticed Survival Dance or Vivid loaded with a slow loading time. It would be brilliant if there was a way to discount the loading times, but I don't see how that can be possible without heavy retiming D:

I have to agree with Awsumi, it would just end up looking very messy, you can click filter > mode > osu!standard and see all the standard plays if you wish. If you have a speedrun that's for example 3:33 on standard but 3:30 on multiple modes, the 3:30 will show up on the global leaderboards, and the 3:33 will show up on the filtered to standard leaderboards, so nothing overwrites :D