Regarding the class balance, the Bard is notably underpowered compared to the Ranger and Rogue. The Ranger is hugely frontedloaded with many features to get the class up and running. The Rogue is simpler but Sneak Attack by itself is a massive upgrade in power. By contrast, the Bard lacks comparable design space. I am playing the playtest Bard and it feels a bit lacking.
I am less a fan of the way the playtest defines each Arcane, Divine, and Primal "spell list".
It is better to
update the Spell Schools to organize the magic spell themes more clearly. Then choose the Spell Schools to build each class concept. For example, the Bard and the Druid have much in common, including Divination and nature-magic Transmutation with Healing. But they differ because the Bard has Enchantment and Illusion unlike the Druid, and the Druid has elemental-magic Evocation unlike the Bard.
Having the Schools organize the magical themes discretely, makes it easy to distinguish and construct each class concept.