So now the en-route facility has received my plan, there could be increased probability of transits, which could involve the handing out of various slot times?
One of my nightmares would be flying VFR to arrive at the boundary a huge block of CAS somewhere in Southern Europe to request for transit and then being asked to remain outside for an unreasonable time because the controllers there are far too busy looking after other flight planned aircraft (but instead tossed mine in the bin).
Therefore I would have to turn back or to go right out of my way to get around it, costing both time and fuel. Fortunately nothing like this has happened to me yet, but I have heard stories.
VFR traffic will never gain priority over IFR, written flightplan or not. Also, if you submitted a VFR flightplan, do you think it's realistic to actually expect to make a VFR "slot time"? Can you plan and fly a VFR flight to southern Europe to the minute?
I think your aspirations are unrealistic.
