I'm still convinced that he wasn't ready.
Firstly, he was under the influence when he announced the tour.
Secondly, according to accounts from AEG and some footage, Michael's performing when rehearsals began in April was good compared to what had happened from June till his death.
Secondly, no where in This Is It do we find the moves he was known for. Moonwalk, kick, etc.
His slide glide wasn't even the same. When I first saw him trying to attempt it I was shocked.
I'll say that his choreographed dancing like Smooth Criminal, They Don't Really Care About Us, Thriller and Beat it were pretty good.
But his freestyle dancing like Billie Jean, Wanna Be Starting Something and Black or White was not good at all.
Just compare This Is It to his last tour, History and the difference is astounding.
Yeah he hadn't performed in a while, but it looked like he lost moves.
I use History because Michael was nearly 40 and aging, yet his dance moves were phenomenal.