Indeed, V Villa is the only time we've properly played that formation, other times it's been 3 deep CMs with two wingers pushing on to support the striker.
We seem to lack the discipline in the middle needed to play that way. If one of Davis and Morgan were told to stay behind the ball at all times, then we'd have enough players back to cover the full backs. But that doesn't happen - everyone just floods forwards without a care for the space they leave behind them.