This is just a idea but what if there were classes in spar so everyone would get a chance at a fair fight. I often see famous sparers going against noobs and winning with 3 hearts and though that everyone should fight someone their level. This would make spar separated into different rooms.
Room One
This room would be unrestricted and would allow anyone to spar in it.
Room Two
This room would only allow people with 0-200 spar wins/loses
Room Three
This room would only allow people with 200-1000 spar wins/loses
Room Four
This room would only allow people with 1000-5000 spar wins/loses
And so on, hope my idea contributes to future improvements