We had one warpriest (been currently playing an inquisitor), a shaman, and a slayer (normally plays ranger/rogues, and is currently playing a rogue 2/ ranger 3). We went a head and impliminted some of the adjustments/correction that are being discussed for both the slayer (d10 and 6+int skills) and shaman (druid list).
Slayer: The player really enjoyed the class overall. He missed the rogues number of skills and trapfinding, but overall enjoyed the fact that he could hit, deal damage, and had decent number of hit points as well. So far it seems one of the strongest and balanced classes.
Shaman: Has issues with the druid list depending on what spirits you select. Player's only complaint was with not really have the right spells to deal with the encounters at hand. Otherwise likes the feel and flavor of the class.
Warpriest: Yeah, here is where the problems came up. Favored weapons are not equal (nor should they be) and current set up felt like a watered down inquisitor or not well built fighter/cleric. The Good domain's blessing was really strong (extra d6 damage against evil critters & lasts forever with high number of uses). But other than that nothing really stood out. The class needs something right now, just not sure what.
After the next update will have another playtest probably around same level.
Sorry, for it not being more detailed, it has been near a week since the playtest. Just remember the basic feed back.