I think this is the biggest loss that I regret from the playtest.because after the last UA reveal where you can pick your spell list/power source,
It was such a good idea -- immediate and easy to implement, leading to an range of builds for the class. Whatever they do, I think one of my house rules (should anyone want it) is that Bards and Sorcerers can pick a spell list to cast from (Maybe not Wizard? I'll have to see what the implications iwll be). But having a cleric-list Sorcerer or a Druid-list Bard just opens up so many opportunities.