Amongst other things, this exploit made win-trading far less onerous. Win-trading is a practice, completely against the terms of service, where players queue, particularly in 5v5 at the quietest times of day, to attempt to ensure they face the same team repeatedly. The two teams will then trade wins, allowing one team to advance to a high rating, then the winning team may switch to an alt team, allowing the losing team to do the same. This is, as we mentioned, completely against the terms of service, and will likely get you banned.
With the exploit, win-trading could be carried out without the losing team suffering an MMR loss. Thanks to this, very high ratings were achievable, and in order to rectify this issue, Blizzard has decided to reset every team and player with an MMR or rating above 2200 to 2200. This would usually have an immediate effect on conquest point caps, but that will take effect next week and will be implemented as usual.
Is this fair? It seems like it might not be for those who have legitimately gained 2200+ ratings, without using the exploits, and for those who benefited unwittingly from the exploit. Equally, why has Blizzard not gone further and completely reset MMR and rating? Do these things only matter at the top?
Hit the break for Daxxarri's full post.