You may recall that, a little while back, WoW Insider posted about the changes being made to MMR tolerance
in order to repair the ladders after a bug. It seems, unfortunately, that these changes did not go far enough to rectify the issues for players of Rated Battlegrounds. It makes sense that, for this far less played discipline, MMR issues have not self-corrected.
As a result of this, matches played are still resulting in 0 point rating gains with wins, which is disheartening at best. So Blizzard has come up with a simple solution that might have been a faster and more popular fix to the initial issue -- increase everyone's rating to get it closer to their current MMR. If these terms are confusing, I made a fair attempt at explaining them in the last post
This, coupled with the initial increased tolerance in MMR to rating parity, should result in everyone gaining points for wins. Hit the break for Lore's full post.
Early on in PvP Season 15, we found and corrected a couple issues that were causing players to reach extremely high Personal Rating when compared to their Matchmaking Rating (MMR), particularly in Rated Battlegrounds. As an unfortunate side-effect of these fixes, some players started experiencing regular games in which they could lose Personal Rating for a loss, but not gain any on a win. This issue quickly resolved itself in Arenas through normal gameplay, but has lingered for a lot longer in Rated Battlegrounds.
To correct this, we've applied a hotfix that will increase everyone's MMR in Rated Battlegrounds by 100. As this change is being applied to everyone (even players who have not yet participated in a Rated BG), there is no change to rankings – we're just bringing the average up by 100.
This should allow players who were previously still earning 0 rating on wins to once again earn rating normally. As a result, players who were already earning rating normally will start seeing higher rating gains per win and lower rating penalties per loss until their personal rating is once again in line with their MMR.
Again, as this change is being applied to everyone, there should be no real impact on ladders as a result. Ratings will inflate briefly (much like they do as part of our normal rating inflation), but there should be no long-term damage to rankings.