I think what's valuable from that episode, from a quasi-philosophical perspective, is the idea of being an immortal (or, in any event, VERY long lived) in a mortal world. Hohenheim is, at least according to the dream, cynical of the worth of mortals, but he finds (and is finding) the resolve to fight for them, because of his kids, Tricia, and Pinako. In essence, those connections make him human again, at least in spirit. Of course, the episode being 80% recap flashbacks didn't exactly do a lot for advancing this (or a similar) idea.
Exaclty. A pure filler evolving this idea further would have been very nice, though. This recap was just bad, even for a recap. The events didn't even seem to connect that much to each other at several points, making it feel rather r*ndom. The only part of the actual recapping that I felt fitting was the beginning, where people were talking about war, and you really got an impression of what state Amestris really is in: a nation ravaged by conflicts, hate, revenge and blood-spilling.
But even the parts where Hohenheim is conversing with himself about whether to give humanity a chance or not, before giving up, feels a little out of character. I always imagined manga-Hoho to bee strictly determined to stop Father from the very beginning, and not losing faith along the way. I feel he still has his heart in the manga, and although odd and quirky, he still has his human values intact.
