Agree and agree. Let's stay away from *Changed. I actually sort of like handleFoo. And, now that I think about it, the alternative we were talking about was for backbone: fooDidChange vs. fooChanged. For that one, I'd also say avoid fooChanged, for the same reason as above.

So: I'm undecided. This is still an open question.

Note also that I think it's sometimes appropriate to call the handler something very different but appropriately descriptive:
https://github.com/xtuple/xtuple/blob/master/lib/enyo-x/source/views/navigator.js#L58
I think the convention need only apply when we're being uncreative and just want the obvious go-to.