The system that currently exists is clogged. There are too many flights, insufficient controllers, strange national ATC boundaries, restrictive rules and precious little investment in modernisation. Couple that to rapacious management who flog their employees to death and you end up with what we have today. Only a fraction of flights will arrive on time, most will be delayed on departure and at times enroute. The problem has been getting gradually worse for years yet the marvellous Eurocrats who are responsible have done nothing to fix it. And if they do try, who pays? Squeezing and extra pound out of a LoCo passenger to fund ATC when they have only paid 99p might be difficult, especially if another quid is required to ensure they have a pilot.
PM