Possibly. Sometimes it is to just get it into a better stadium. Vandy plays Tennessee often at the Titan's Stadium because it is nicer than the Vandy stadium.
Arkansas likely wanted the game in Texas annually for recruiting purposes and A&M probably likes game in Arlington as well. It was likely a win/win for both schools.
BTW, get ready for Arkansas. I think they will probably give you more headaches than any other new opponent on your schedule. I know they are biting at the chomps to play Texas again on a regular basis. Last year was a good example.
They really have nothing to lose against you which makes them a scary annual opponent.