I just got the Script 2 yesterday and it seems to work well with my iPad Air 2, unlike the Bamboo fineline which from my understanding shared the same issues as Adonit's styli on the Air 2.
No skipping or anything in Penultimate, but it's not my favorite app and several others that support the 1st gen Script/Touch seem to recognize it as a Jot Touch for some reason and the behavior gets a little wonky (GoodNotes is one). Works fine when not paired (though then there is a slight tip offset) so my guess is that it is just an out-of-date SDK issue.