One of Omni's minions reports that ending was ok:

A wonderful ending. Though I was pretty down on last’s weeks episode, and was correspondingly worried coming into this one, I must say that the show recovered nicely and ended the series in true Rinne no Lagrange form. It was idealistic, it was upbeat, it was heart-warming, and it was full of wishes realized, friendships renewed, and a bright future ahead for everyone involved. Perfect.

I didn't read any further than that, but it's possible that Tatsuo Sato's other show of the season may work better than that pirates thing... That would be great, because I did not like the pirates. Much too fake.