Many small changes impact the game experience in 5.1 (still on the public test server), details have been made on the US forums by members of the Blizzard team.
The first, a message from Daxxarri, informs of changes in the heading of conquest points obtained in PvP:
At 1500 rating, the Arena Conquest Cap will now be 1800 (up from 1350), while the Rated Battleground Conquest cap will be 2200 (up from 1650). As always, when your rating increases, so will your cap.
Indeed, in order to help players use the new system to improve their equipment with conquest points, the maximum number of arena conquest points (with a rating of 1500) has been increased from 1350 to 1800 while the conquest points of the rated battlefields increased from 1650 to 2200.
Of course, as the odds increase, the course will follow!
The second, posted by Crithto, talks about reputation for rerolls:
In my original message, reaching Revered with any particular faction on Pandaria would have triggered double reputation for all characters on the Battle.net account with that same faction. After testing this internally, we felt the "trigger" wasn't obvious enough so we decided to create an item that players can purchase which, when used, grants the user's account with the bonus.
It was originally intended that once a character reached the revered reputation level, all other characters in the Battle.net account would see the gains on that reputation doubled. It was judged internally that this was not clear enough and they decided to create an item that players can purchase which, when used, grants the player's account this bonus.
Not good news for anyone like me who owns a lot of characters, and is already tired of having to build up all those reputations ...