eating dinner so, not giong to add notes for this section. just going to mention this weapon swap thing.
can assign weapon sets to weapons, and using a skill will swap to that weapon.
edit:
adding some of the things I noted while eating.
passives added from books can be swapped via afore mentioned weapon swap on the fly.
no more mana reservation. spirit is the new reservation bar. a separate resource specifically for reservation.
all caster weapons now have innate magic attacks, instead of melee ones. staff giving a fireball spell, or staff giving a buff that boosts next spell cast, etc.
Skill gems now drop blank. you can pick what skill they are. not sure my thoughts on that.