10-29, 30-54, 55 & 55 Ranked.
I've got a blog post coming up explaining in detail the reasoning behind these bracket changes for 2.0. Stay tuned!
I thought we already had a yellow post explaining the reason for the split at level 30. It said it was because that's when you unlock an important ability in your skill tree that gives you more of a solid rotation.
Yes. The new Bolster will be present in all Brackets.
I think a lot of us would really appreciate it if the blog contained details about how you balanced the effectiveness of the bolster system for people with bad gear against the incentives to obtain good gear. In other words, just how good is bolster, and how much better will a bolstered level 55 in the best gear be compared to a bolstered level 55 in entry-level gear?