Well, there should be at least one patron per archetype (Archfey, Fiend, Great Old One, etc.). I would very much like patron specific content. Like, your patron can come to you with a quest or demand something of you that is specific to your class/character.
Would also like to see Paladins needing to recite the oath they wish to embody, or an Eldritch Knight having to complete a quest line from a Wizard to gain their subclass abilities, or a Beast Master Ranger needing to track down a pet of their choosing. There are so many different ways to incorporate specific class content to make the game feel more immersive.
We had class specific strongholds in BG2. Hopefully there will be more class specific content in BG3.
