It was a move intended to help Wade Phillips. From my perspective, it is clear Jerry Jones likes Wade Phillips and wants him to succeed. He likes the type of relationship he has with him, which obviously is very comfortable.
If he was out to truly get bang for the buck for a consultant, the last person he would hire would be someone that close to Phillips. It also signals that he is nowhere near ready to replace him either. I have no doubt that Jones envisions this as an opportunity to keep Wade Phillips and salvage his tenure, not have him in as a true consultant to take apart the organization and staff and go over it with a fine tooth comb. Reeves is non-threatening and very unlikely to be invasive to Phillips.
The level of consideration to Phillips is considerable. If they truly wanted to get a top to bottom consulting job done, Reeves is not the person to do it with the parties in place.
If he helps Phillips, fine. I just do not read as much into it as any sort of change or commitment to it on a grand scale from Jerry Jones. This is just helping ease tensions with the fan base, keep the status quo while trying to improve and provide Phillips with the help he apparently needs.