I skipped this expansion. What have I missed?

Just curious since this was the first time I skipped an expansion since starting with HW.

What is the content like for Dawntrail in terms of job design and encounter design?

I heard how powerful Pictomancer was, but also how fun it was.

Anything new for the casual side/individuals not into the hardcore content?

I enjoyed Criterion dungeons when those were introduced.

Is there anything being done or discussed for the future that would interest a former player to return to the game for next expansion?