Demoting Mastery Ranks

So for a while now I've been looking at my profile wanting to change one of my mastery 7 champs back to mastery 6 to add another place for someone else. Say I have mastery 7, and knowing Yasuo is a hated champ and I no longer play him at all I would like to derank him from mastery 7 back down to 6, just to show I main . But this is unavailable, (sadly). If this became an able thing to do in league, it won't change anything in at all, just the fact that this person doesn't main this champion. It won't take long to code as it'll just have a new button which will say "demote champion", and either it'll put the 3 tokens back into your hextech crafting area or it'll just plainly disappear. Small change, with a small difference. :)