During early access, they will be adding content that will be in the full game. We "know" that somethings, will not be added until full release, like Ritual Spells. But other features will be added as we go along. So what do you want them to add first, second, ect.?
My priority list is as follows:
1. Multiclassing
2. Feats
3. Races/ Subraces
4. Subclasses for existing Classes
5. The other 6 PBH Classes
2. ALL feats
I mean, I hope they don't come with bullshit that feats from expansions are not going to be in the game. The expansions are already available, so there is no reason not to implement in the game.