Lylirra gave us an update on the release of beta patch 13 stating:
“To ensure that all systems and changes included in Beta Patch 13 are working properly, we’ve decided to take some extra time to continue internal testing. As a result, we will not be releasing Beta Patch 13 today. We will, however, be working through the weekend and look forward to delivering the patch on either Saturday or Sunday.
Thank you for your patience! Should any changes to this schedule occur, we’ll be sure to provide an update in this thread.”
Bashiok also confirmed on Twitter that we should be seeing the new changes to the rune system (along with the skill changes as well) with this patch. Exciting things on the horizon.