This isn't John Cavil having an epiphany about the wonder of love, it's John Cavil having an epiphany about the nature of reality and finally accepting, rather than raging against, it.

I got that too. It just increased my love of the Cylons and how they're almost simple...and yet not. Each model in their own way can be simplified to a point where they look cliche, but the show rarely diminishes them to that. And that complexity is why the main theme of "The Plan" (and BSG in general?) didn't make me roll my eyes; it's not "true love conquers all", it's "love is unavoidable", which is so much more interesting.