I think in some points we are too harsh, in others too generous with McKenna. He's an old-school defender, strong header, good tackling and positioning but slow, stiff and playing the ball as if he had wooden blocks instead of feet. I see Kevin's DEF a bit better, his positioning is not that bad, could be on 79. Same with balance, +1 to 87 wouldn't be a bad thing, also TW should be on the same level as MENT imo.
About decreases, while I think TS is okay for him ACC should come down a good bit, he isn't this explosive, never was, never will be, TS > ACC. John Terry has 65 AGI, I think that'd be a good number for McKenna, too. His passes are rather inaccurate as well as his TECH being a bit weaker than current value.
Short Pass Accuracy 68
Short Pass Speed 73
Long Pass Accuracy 71
Long Pass Speed 73
EDIT: looked up McKenna's new Konami set (http://pesdb.net/pes2013/player.php?id=100110
), seems like they didn't gave him some generic stats but I can't really see how they fit him.