It seems like I misunderstood something when I watched this episode. I originally thought Hatsune died during their Christmas outing since there was such an ominous feel to it with her weak voice and all. I was also expecting this to come up just as it did with a previous series.
So after that, I thought Otonashi left to pursue a career to heal other girls who were bedridden, rather than his own sister (and I took "losing" as her having died, not living away from him). In that sense, Otonashi's story would have probably felt more emotionally powerful to me than to others who interpreted this correctly, as he didn't just realise, but had to pay a dear price to do so.
Kanade moments were awesome. I need not say more.
The red-eyed Angel was actually the one who did the flying swallow attack on the fish (there were 2 Angels after the split), and she also kept her eyes closed after the attack. Why no one (from the SSS) picked this up, I don't know. Maybe Yuri did (since she wasn't worried about being eaten) and went to pursue it, resulting in her injuries.
When that first came up, I thought it was one of those jealous, cheap tricks where you hurt yourself and say someone else did it, but that seemed not to be the case.
Shiina's decapitating move proving to be an extremely effective assassination move, but an utterly pointless fishing one got a laugh out of me, especially since it was accompanied with the "Idiot" commentary.