Well as i read the play test core book i see few problems needs to be solved in next iteration of playtest core rule book.
1. I think we need to rethink the every thing needs feets aproach as it limits the character creation. my solution is kinda boring but old pf style class features was good and just needed more feats to flesh the ideas 10 feats is kinda not enough to get flavorful character while keeping power levels just enough to do the content.
2 anchestries and races okay even amateur home brewer can write better feats then that. As all feats kinda lacking luster as even Tolkien's haughty elves has much more flavor then our current elf ancestry where is the options that take advantage of long life to become wizard. We can introduce at least 5 or six time the current feats and current flavor cant change any way so solution again why fix it when its not broken we can keep pf 1 ancestries and give more usefull feats to make sure ezren actually feels like way old nearly immortal wizard that married in past
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3. resonance and other stats while alchemist getting int to resonance is kinda good but it opens desire to abuse the hyper competent wizard mold as changing resonance stat to anything other than cha actually makes sure wizard becomes the god class again. since we can multi class into magus( and we still need spell strike feat) solution this one is actually kinda simple dont give int to resonance or if you gonna make a feat for it make sure the damn thing has at least charisma 18 as prerequisite so you have solid reason to screw math you guys trying to balance.
4 multi classing well the new multi classing looks good but can we please buff caster ones little bit like one more casting slot feat at i dont know level 14 to reach decent spell casting chance or at least buff the initial feats for a little bit so they can worth the damn feat we pay.