I want to see them bring custom role actions into normal pve. Mixing and matching phantom jobs to normal jobs has been the most expressive i ever felt gameplay wise in ffxiv. But if we get anything like it in the main game i expect that it would be more similar to what they gave us in pvp- an approved list of role actions that you can choose from. I would like more options and variety for overworld content but i wouldnt expect full free reign on subclasses the way that elder scrolls online recently introduced because the devs cater too hard to balancing 2 minute meta savage.