Blizzard posted and then removed an update about a Diablo 3 50% buff to player experience up until 24 March which is the day before the Reaper of Souls launch date.
The news came in a Blizzard blog update which was subsequently removed from their news page for some odd reason. It will probably reappear later or tomorrow but this buff is happening right now.
Blizzard say they want to give players’s “leg up” on the new Paragon levelling system which came in to play with last week’s 2.0.1 patch release. Now all characters share a Paragon levels so make use of this buff window and get killing stuff.
Here’s a quick tip from Flux over at Diablo: IncGamers.
I’ve done a few runs for testing purposes, and it gets mind-numbing quickly. My new HC DH is all self found in v2 and can’t safely do more than T1 for real, but I can do Mira on T5 without much trouble. That takes about 3 minutes per game and I get about 14m exp for the whole cellar; the displayed exp for just the quest on T5 is around 7.1m, but I’ve got a ruby in my hat and HR and Leoric’s ring on my merc, so it multiplies up considerably.
A handy tip there and you can read other player’s comments on this buff over on Diablo: IncGamers. May as well get those Diablo 3 characters levelled before the ROS release.