Disappointing, as from the east side of London it's far more straightforward and quicker to get to Stansted than Luton - that's over in Bedfordshire.
The downside of a W pattern is that you can't readily do early morning departures, and thus miss out on the business market for these. I can remember back in Go days the huge check-in queues for the early departures, many in suits. Has that market really all gone ?