Oh dear god, no. Not that stupid mode dial unlock button. To me, that's one of the most useless additions that Canon can put on a semi-pro body. I can see the reason for putting it on the 60D, but come on. Anyone using a 7D or higher should have some idea of what they're doing and in all my years of photography I've never heard of anyone accidentally switching the mode dial unintentionally. If the new 5D is in fact coming standard with the unlock button, I hope that one can "downgrade" and remove it. Even for a fee, I'd do it.
That unpleasantness aside,
Hmmm I thought it was the PROs who had MOST asked for that feature.
I've heard them complain of it switching as it rubs against chest as they are chasing down a shot and then they whip it up for a shot and it's a mess.