How does the lack of attacks of opportunity work? While I'm happy to hear people won't be wasting time walking spiral patterns to avoid getting hit extra times, what prevents a monster from just walking past the fighter and hitting the wizard?
Attacks of Opportunity are still there for Fighters and some monsters.
The combats are more fluid. The group I played the PF2 Playtest in was generally okay with this extra fluidity. (I was not.) As the person who generally played a Wizard, your AC stays competitive and with a little multiclassing you can wear full armor. Assuming PF2 doesn't significantly differ from the PF2 Playtest, this is one way the game feels different. You can always house-rule AOO's back into the game without much effort.