Yeah, assuming you actually believe this guy is comparable with other recent 1st round picks Vaakanainen and Heinola (which I don't see why not), I think it's definitely something we should look into.
Like you said, the Leafs took Liljegren from Rogle, and we can assume it's because a) they didn't like how he was being utilized (played on 4 different teams in draft year, and 4 different teams in D-1) and b) they didn't like how **** the team was.
If they see the same thing for Kokkonen, I hope they don't hesitate.