I would rather prefer more classes for the EA and focus on base mechanics. The way the game works now makes me warry of playing it further as the balance/action economy is already questionable.
I agree but we really need level 5 as well for the 3rd levels spells.
Mechanics are important. Right now the Abjurer's mechanics are so messed up that it is not worth playing. (Arcane Ward is NOT temp HP).
Follow that up with Fireball being the wizard's power curve jump at level 5. And look at the Abjurer getting access to their key spells for counterspell and display magic.
I think level 5 is one of the most import levels to look at for everything you said.
Yeah, that's true. At the same time I would prefer more classes to have a newer experience. Going through the whole ordeal again just to get LVL5 to see something new is a bit deflating for me

I guess its just because the party I would love to try out consists of a paladin, bard, druid and ranger, while cleric and mage are very, very low on my list of things I enjoy to use

But probably from a development perspective getting the fundamentals right going for level 5 would be the right next step having to just spend time on getting the current 6 classes up a level giving more resources to deal with existing issues and getting comparable feedback to the one they had before.