[[ By the end of the process, said another source, Bush could end up spending as much as 50 hours in preparation, an amount that far surpasses what Mitt Romney had done at this point during the last Republican primary.” ]]
I sense that this in itself is part of "what's wrong" with such "debates".
More than that, it's what's wrong with the candidates themselves.
Bush's answers will be so canned, so pasteurized, so sanitized that they will come across as "nothing words", like one of Hillary's "campaign speeches".
I wonder how much prepping Mr. Trump is doing. I'm sure he's doing some, but that his responses will be much more shoot-from-the-hip -- and more substantial, as well!
Even if Trump is bombastic and outrageous, Jeb (with all his "preparation") will come across as Spam from the can...
Aside:
I sense that Scott Walker's big chance to break from the pack is going to be due to his performance in the debates. We'll see...