Which classes would you like to see the most? and ... just write whatever you would like to write regarding that class
Here are mine:
Bard:
I enjoy the style of a bard, especially the music instruments and I think he could be designed to be a great support class - especially for supporting other players in multiplayer. Being able to mainly support other players instead of directly fighting would offer a new playstyle in which Icould primarely focus on my relationship with them: E.g. I would have to know their skills to support them optimally and coordinate with the skills they want to use. So playing bard could be less about the bard himself, but about how I can think of myself in a supportive relationship to others.
Another idea I have would be a song weaving mechanic, were you can compose actual music during combat for effects. Playing certain notes allow you to follow up with certain other notes to continue a melodie. My keyboard could become a music instrument and I could focus on both: continuing the music in a harmonious way and playing what is meaningful in the current combat situation. Or another system could allow me to create my own skills: certain notes are a modifier, another note is the kind of skill (melee, range, AoE) and a final note is the main effect. I could compose my skills in that way and they would have the designed effect while playing the chosen notes as a melodie. Certain melodies that are good creations could sound better than others were I badly combined skills. The developers would need to think in sounds to design this.
Druid:
I imagine shapeshifting into different enemies to be really enjoyable and would hope for each animal to have distinct and interesting skillsets. Nature magic and mysticism sound fun as well. Ideally each of the forms would have it's own depth and playstyle, so that shifting into an animal would be far more than just shifting into it to get a strong armor penetration attack. Also the shifting itself could have an effect, so that timing it would be meaningful in combat.
Artificer:
I like complex classes and the artificer seems to be one from my reading of it. Also being able to interact with all kinds of objects around me sounds fun and the artificer could be designed to interact more with the environment and things lying in it by infusing them with magic.