Like:
- 3 action system
- Much more difficult and dangerous monsters and encounters, so now heroes have to draw on all their resources and actions to defeat them, and the danger to die is real.
- The new critical system of +10/-10 and 4 different results for saves and other things.
Dislike:
- Classes too constrained due to limted and fixed feats. Also abilities are very similar for every character, specially at higher levels.
- The +1 for everything. Every class seem very similar in capacities for everything. Besides being expert, master o legendary doesn't add a significant change to the roll.
- Magic has been too much nerfed.