Mastery Tree Suggestion
I want to start of saying that so far I've loved everything the new system has added to the game. The Keystones all feel impactful and relevant, with the exception of maybe Stormraider's surge. The keystones need some tuning but they have the right idea's behind them.
What I feel could be more impactful are the choices within the first 6 points of a tree, I haven't seen anyone going 18/6/6 because the first six points you spend just aren't tempting you don't ever sacrifice Dangerous game for Tough skin or any of the other 12 point masteries for another 6 point mastery. The other thing I would like to see changed is that no one ever goes 12/12/6 either, I think that choosing your masteries shouldn't just be about which singular keystone you want and what to take along side it to support that choice, though that's a fine design for the system. I think it would do more if instead you could choose to take two 12 point key stones that really help you to play a certain way over one major keystone as it is currently.