I am not sure what is going on inside the Unidad campaign but the announcement that Capriles may decide on his VP before election day is, in my view, a possible major blunder. Quickly a few reasons:
1) there is no need. In Venezuelan constitution a VP can be removed at will by the president, just as if he were a mere minister. In fact, he is less than a prime minister because in countries where there is a prime minister removal of this one implies automatically that all the other ministers cease in their functions. In Venezuela all the other minsters stay in office when the president decides to change the VP.
2) the Unidad is still a fragile coalition. True, it will hold together until October 7 no matter who Capriles picks, but no matter who is picked, someone will not be happy about that. The lack of motivation of a given group could cost Capriles several thousand votes in an election which is still closer than what many may think.
3) naming a "running mate" is offering Chavez a second target for insults and criticism, in that order probably. Capriles has developed a thick skin that looks more and more Teflon like. A running mate at this point in the game could become a nasty chink in the armor.
There are other minor arguments against that could be added but I will settle on these 3 for starter. Besides, who would he name? Leopoldo? And have Zulia pissed? Perez? And compromise the governor seat in December? Aveledo and offer the chance to chavismo to say that Capriles is tied to the past (in spite of all the immense merits of Aveledo who has one of the most modern poltical thinking of Venezuela today)? A born again opposition like Falcon and risk to depress the radical wing of the opposition?
I stop now, but you read it here first. I hope that I am proven dead wrong but I am really afraid that this might be the first blunder of a campaign so far almost flawless.