That's all fair enough but raw is one thing and I think Kleven is not raw; he just doesn't have any passing or puckhandling skills. Zibby was raw but you saw glimpses of a star player waiting to break out. Hell, even EK was "raw" in that he needed to figure out how to use his speed and vision to fit a pro style and he obviously needed to get bigger.
Kleven is not a real NHL option for 3-4 years AT LEAST, so patience will obviously be needed. I just have serious doubts about what it is we're actually waiting for. Looks like a PK specialist who plays on your 3rd pair to me, which is fine. I just think we could have gotten 2 prospects of that ilk (or with more upside) with the picks we traded for Kleven. And I like two better than one.
All this having been said, we're talking about a kid here. His career is just beginning and hopefully his development takes off and we end up with a Brandon Carlo type player.