As regulars at Stansted we actually find that we probably spend less due to the circuitous route. The good lady likes to get through to the departure area, get settled then perhaps do a bit of shopping, the thought of fighting your way back the "wrong way" to get to an earlier so, just means that shopping is just done in the few shops visible from our selected perch (normally the fish and champagne place). I too might week, in other circumstances, visit the whisky place or another ship, but I can't remember what we passed on the way in. So don't bother.
i would rather they just got me in quick, gave me somewhere to sit, and let me get bored. Then I might shop