Just some quick thoughts: That ED was unexpected and completely fantastic. I thought it was a cute joke at first, but that scene afterwards explains and changes so much of what we've seen.
Other highlights for me were everyone leaving as soon as JJ showed up (started guffawing there) and Phichit's best man toast.
The ring exchange happening in front of the church with bells ringing was pretty reminiscent of a wedding. And we got a lot of insight into Victor, finally.
Also, nice to see what the other skaters are up to:
-Georgi is finally moving on.
-Michele doesn't seem to realize it's Seung-Gil who Sala is after.
-Minami has become the leader of Yuuri's fan club.
Lastly, Chris overload. Someone censor that man!