I don't think McD is actually a terrible defensive player as it pertains to ability. I don't see him as much as some others do (west coast folks) but watching the Oilers when I can, some of the problem is their style of play. They put McD in a position where he's going to look poor in his own end. He's essentially used as a breakout force, which isn't surprising given his speed and all world ability. Having said that, I don't see him engage physically much. He just doesn't have an interest in consistently fighting for pucks, or going into the muck so to speak. He's not going to take important draws, and in the dot, he's quite poor, compared to other #1 C's. I do wonder how much Edmonton's dumpster fire organization is affecting him at this point.
I think the VsX chart really shows how limited he is in terms of longevity. He's amazing through 4 years offensively but drops like a rock after that. In a few years time, he'll be more than worthy, certainly of going inside the top 100, and likely well up that particular list.
Obviously I'm not a voter this go around, but I've been following quite closely (great job to every member so far) and I just can't in good conscious agree he's worthy of going yet. There are just too many knocks on him right now.