Randyll Tarly is an interesting person in regards to his loyalties to the Tyrells and the Lannisters. He seems to be their loyal man but they are a old family and might have similar feelings about the tyrells being up jumped the Targaryens. He answers the call whenever they send a task to him, but he wastes no time to run back to King's Landing and take control of Margery. Is this a power play? What if Sansa had ended up in Tarlys hand or evenually does? Would he turn her over to the Queen, or the Tyrells or would he try to marry her to Dickon pending he gets both of them out of their current marriages? What are the odds that the Tarlys make a play to control the Reach or the Stormlands ?