Romo said.. at least I think it was him.. that they were running some really exotic stuff early on and they were essentially doubling both TO and Witten... Which I guess is rare because the other remark was something like.. you can't do that in this league..
I'm guessing if they had Witten and TO running routes to one side that both safeties would go with them and leave the rest of the field to Crayton.
If Crayton can win those one on one's there is no point in moving TO all around to free him up because he will probably still be doubled. Especially if every time you put a certain alignment out there they give you a favorable matchup(one on one outside with no help over the top), then you just keep lining up that way until they prove they can stop you.