#3 Making Dean Ambrose and Seth Rollins secondary

The obvious answer to them doing this is of course to capitalize off of Shield nostalgia as much as they can, but again, at what cost? While Dean Ambrose probably is best served in a subservient role right now after returning from injury, Seth Rollins was a white hot babyface before being bogged down by The Shield reunion.
That's not to say that Rollins isn't benefiting by The Shield being back together, but one has to realize that the end result isn't to make him look good. The end result is to make Reigns look good and to make fans forget why they hated The Big dog the last in the first place. With that being said, keep in mind that making Reigns look good will come at a cost to them.
Look who just shut down all of Tony Khan's critics! More HERE.
In the end, that's good for either Ambrose or Rollins and will most likely keep them out of the title picture for the foreseeable future. Of course the argument could be made that it will just make it that much sweeter when the Shield finally implodes again, but it becomes less interesting when we know what the end result will be.