I don't think it's the entry/exit lanes themselves that's the problem. I believe the concern is whether or not a Private Pilot visiting Stansted, for example, would be fully conversant with a published Standard VFR "Puckeridge Departure" ?
A similar VFR procedure did work well at Glasgow many years ago, but I think its use was confined to locally based operators (GFC & the UAS). The abbreviated clearance on the R/T was passed as Standard Exit/Standard Inbound, and annotated on the ATC Flight Progress Strips as SEX & SIN.
