The original series was about growing out of your awkward early teenage years, getting over your delusions and accepting a measure of adulthood and responsibility. This second season takes all the lessons learned, character's increases in maturity, and goodness from the first season and forgets it. It focuses on the odd romance between Yuuta and Rikka, which progresses in a non-standard fashion.
My verdict is:
It's fine, as long as you don't expect anything deep.
That said, it's KyoAni quality animation that looks great. It's just no where near the caliber of show the first season was.
