I agree.
You've seen more of Juolevi then I have so I'll defer to your analysis. But, we're basically agreeing and saying the same thing. I see exactly what you are talking about in my limited viewings of Juolevi. Excellent smarts, good puck mover (as evidenced by the pass to Jones last night), average skater, prone to mistakes against a heavy forecheck.
I think him and Tkachuk both need another year in junior. It would be good for Tkachuk, he'll probably be the captain and "the guy" for London (I'm assuming Marner is in the NHL), would do wonders for him long term.