Some Thoughts:
- It looks like they kept the concept that each skill is only dependent on a single stat (int for magic, dex (finesse) for thief/archer, str for fighters). This means hybrid chars will still have problems and mages still have most options.
- The influence of speed, per and con on AP is gone. So it looks you must choose if you put all points in one base stat for max power or if you split between one main stat and memory for more utility. Wits for initiative looks also important. I hope that wits will allow you to get other options than fighting because you can talk your way out (not always of course).
They only removed Speed. Perception is still in, just renamed to Wits.
Fighters in D:OS 2 will still generally go for a STR/CON mix, just like in D:OS 1. The removal of speed can help them there, where in D:OS 1 having to use 3 stats tended to make them slower.
Rangers in D:OS 2 no longer seem to get accuracy from PER (now WIT), so they can mostly stick to FIN and not spread things out much. They might split points with WIT for the critical chance, but don't need to.
Without Speed, that changes the DEX/SPD blend of Rogues, but they'll probably shift that over to a FIN/WIT blend instead.
Mages now have a reason to split attributes, and I imagine that they'll go mainly for an INT/MEM blend.
In essence, Fighters and Rangers become more powerful thanks to less attribute splitting, and Mages now become notably less powerful than in D:OS thanks to both a limit on total skills and now being forced to split attributes. Rogues probably become slightly more powerful, but probably not by very much.