Oh, I agree with you about Eisner's appetite for acquisitions - in fact, I think he's the one who started the whole trend at TWDC. BUT...he was engaged with the studios and with the parks, it seems to me, in ways that Iger is not. And that, to me, is his saving grace.
I would only add that Eisner didn't acquire much when you compare it to Iger. And, again, his biggest acquisition was also his smartest (Cap Cities/ABC, which also brought the ESPN juggernaut!) Michael was always involved ... a hands-on leader, to his detriment say many of his critics (I'd disagree as I'd never want a CEO that doesn't know what is going on in all of his/her divisions!)
Bob simply delegates. And buys shiny new toys. And crows about his love for technology and his many BRANDS.
To take that Eisner tale about skulking around EPCOT after hours, not only would Iger never do that, but if he were forced to, I could see him getting hopelessly lost in simply one building and not having a clue where he was or how to leave it. That wouldn't happen with Michael at TODAY's EPCOT.