From the combat perspective I like bless requiring a source point. I always avoided using it in EA because of how op it was. I do hope they reworked puzzles to account for the change.
Skillbook cost being higher is nice. I hope they also added higher requirements for stronger skills. It was too easy to grab the strongest utility skills from each school.
Skin graft being a source skill is great. This ability should have never existed the way it was in EA. Now, I hope adrenaline was made harder to get on every hero.
Stun changes are nice though I wish they just reworked hard cc. I hope knockdown received a similar nerrf though, otherwise it's still too easy to cc-lock.
