For my benefit, could someone explain exactly what the problem with this choice is?
Because unless you have a yellow peril and also a poo brown/blue/green cover book and are operating in the area that you provide a service in. You won't have a clue what to expect in the air. The variation in service provision is huge between units and mostly is directly linked to how much you pay in landing fee's.
ATSOCA isn't fit for purpose. It ignores flight rules, forgien pilots and alot of commercial pilots that normally operate in CAS don't have a clue how it works. And the pilots that do know how it all works employ ways and means to circumvent the spirit of the service that it was designed to allow because they don't want to be controlled in class G. Why should they burn extra fuel so a loco gets less track miles?