Still puttering through the playtest, *trying* to get a game together. All this stalling is helping us ponder some of the build options for higher-level PCs, specifically multi-class feats. Cherry-picking tasty choices from other classes has some potential, although most feats seem to enhance class features, making it less valuable to multi-class into them.
However, we realized that there's an easy way to get from the Dedication feats to Advanced Dogma/Arcana. To get to Advanced Dogma/Arcana, you have to go through Basic Dogma/Arcana (or whatever the class' equivalent is). What we realized is that there's a lot of similar feats at low-levels, where two similar class would probably take that feat anyways if it wasn't multi-classing. Familiar feats, metamagic feats, etc. Taking a 1st-level feat when you could have taken a 4th-level feat may not be optimal, but as a stepping stone, it might encourage people to make a deeper plunge into multi-classing beyond Dedication.
IE. a Transmuter Wizard taking the Druid's "Healing Transformation" feat after taking the Druid's "Reach Spell", or a Rogue taking the Fighter's "Shatter Defenses" feat after taking "Intimidating Strike".
Nothing earth-shattering, just an observation.