For the most party already confirmed by Yoshi-P as the focus for the main story is battle classes.

I think this sounds good, but there should be some parts, or other stories that can be soloed or small group. Having content for all group sizes would be a plus.

I think everyone here supports more content and looking at the job quests as an indication I think we'll have some fun main story quests shortly. (aka 1.22/1.23 => 2.0)