I'm not sure you can call Kane one-dimensional given the multiple dimensions to his offsenive game (playmaker and goalscorer). As to his defensive abilities, that is probably #10 on the list of things are looking for in Kane. Defence you can teach and when you're talking about a bluechip offensive prospect, that is not a major concern at this point.
Just as an example, Hossa and Bonk were regarded as one dimensional offensive players and each ended up being one of the best two way forwards in their respective draft classes).
I'm not saying Kane will become great defensively, but I don't think his downside (Kyle Wellwood) is that bad, especially when you have a Brad Richards-Daniel Briere type upside.
Kyle Wellwood is a Franke Selke candidate compared to Kane on the backcheck...Kane couldn't backcheck his grandmother from what I have observed...perhaps he can be taught ...but there is also a physical aspect to checking--Kane simply is not strong enough to knock guys off the puck--if he can get his stick on the puck with those quick hands he can steal it from you-BUT that seems predominantly on the forecheck--on the back-check he gives up very quickly if he cannot tip it off your stick rigt away--PLUS he really is not that FAST in straight line recovery speed to catch upto you again once you have got by him--I do not think you can be taught to rectify those things;I doubt he willbe even average as a back-checke and thus will be a definite liability defensively --especially against bigger,stronger faster NHL'ers than the weaker jr. competition he faced so far...
This is opposed to my criticism of Phil Kessel as not being good defensively--in PHIL's case it was more the WILL to do it that was lacking--he certainly has the catch-up speed to back-check once a guy got past him -IF he applied himself to the task;
I am saying KANE is NOT AS FAST AS KESSEL in straight line speed without the puck;he is aso much smaller and physically weaker than Kessel --so given these 2 facts--EVEN IF KANE applied himself to defense with more effort in that aspect,I still doubt how effective he willbe trying to stop the opposition..
Look --it is similar to Pavel Bure---the guy was pure offense;you know he will put up points (though Kane is a totally different style) ,BUT you also know he will always STINK defensively--you either live with this problem due to the magnificent scoring he gives you,or you try to mitigate the damages by hoping others on your team bail you out when the guy Kane or Bure is supposed to check is "let go" by them to freely attack your net...
My point is that when someone says something foolish like: "What's not to like about Kane" ( given how dominant a scorer he was inthe OHl in his rookie year)--the answer SHOULD BE: 1.His defense 2. His size+ concern for how he will withstand injury risk at the NHl level.
If you can live comfortably with these 2 concerns,then take him at #1 -he will put up lots of points with those great hands--maybe the quickest in any hockey league on the planet.
BUT be prepared to try to win 8-6 --however you may be losing 6-8 if you can't "cover" well enough for his dfensive weaknesses.