There's certainly been a huge increase in the the use of 'unofficial' parking/waiting places all around the airport this summer, so something isn't working properly...
Might have something to do about the uncertainties, when meeting arriving passengers, of how long it will take from aircraft arrival to appearing from the arrivals hall. By the time they have waited for busses, been help in a lengthy Immigration queue, waited for the undermanned ground teams to deliver their bags and then fight their way out through the 'doors from hell'. If you park up just after aircraft arrival you will need a large balance on your credit card to get your car out of the car park.
My other half always waits in the lay-by or somewhere within 5 minutes until I call to say I'm clear of arrivals.