Totally agree with Senior's point here and have said it more than once on this forum, in this particular case and at this particular time, it's a massive feature, not at all a bug.

I didn't realize how much so during the primaries at all, it was just: he's a centrist, he'll be fine. Other people would complain they don't like him at all, bring up examples of big bloopers in the past, how he sold out this for that, clueless about this or that, and I would find myself thinking: ok, maybe they're right, he'd make a lousy candidate.

But then I saw what he was doing when he really started to get some steam and more and more every day I started to see it: whoa this guy is perfect because he's been there and done that, learned from all those mistakes, plus knowing he's going to meet his maker soon and is a believer in god, has left behind most reasons that can influence younger men to do morally questionably things. The only influence left at his age is legacy concerns. Where undue influence would be because of narcissism or perhaps something like a family business that you wanted to benefit your heirs. If you know anything about his life, he doesn't have those issues, just the opposite.

Throw in that he was an active V.P. for 8 years, knows exactly what the job entails, knows the White House, knows the mistakes Obama made, can call on his Dem predecessors for advice,  knows nearly everyone in the Senate personally and knows up down and sideways how Congress works. 

If you look at the presidency like I do as a purely executive position and don't expect activism from it (like I think other people do, very unrealistically), he's like a god sent perfect candidate for the job!