Hmm, going to go out on a limb here but....
Why Andy Wallace? With all due respect to Andy, who's been a hell of a racer over the years, I would think in Rob's situation he would look to go in the direction of a fast, young gun to partner with Butch and build a team around for a few years to come. This seems like replacing one middle aged racer with another. You need someone in the car who's going to drive the wheels off it, especially if Dyson is going to take the fight to Audi. I'm not convinced Andy's the guy, not anymore. There may have been a time when he would have been the guy for this, but I don't think so anymore. To me this is a case of Rob opting for Andy out of loyalty and his relationship with the team. I think he could have gone with someone quicker. Like I said, I think Andy's a great guy and a hell of a racer, but I think he's past his prime for the role of a fulltime ALMS LMP1 driver, where most of the races are two hour and forty five minute sprints.
Fax