I like that the power cleans add explosiveness to the program. All the other lifts are slow (at least when I do them) and the power cleans make the program a bit more versatile.
I do try to keep lifts explosive as I can, though I can already feel how hard that will be as weight keeps growing.
I think the olympic lifts are really cool, but I feel it'd take significant motive to go off program and include them at least until I top out on 5x5s.