Maybe there's something to be said for *encouraging* GA to route through controlled airspace when it fancies,
That is what I do if possible. When going to the IOW from the NW I always ask Bournemouth for a transit via the o/h rather than squeeze down the StoneyX - Beaulieu gap at < 2000. Although VFR and I know I am responsible for my own separation, the traffic density can be less in CAS, or it is being controlled, or you may get a warning. One of the other posters on here told me how he goes at 4000 in Solent's airspace rather than fly along the Solent at < 2000 which seems a good idea - I've had a C172 pass 200' o/h in the Solent once which scared the crap out of me!
Unfortunately there are areas where the airspace is Class A and hence not available to VFR. This is wrong in my opinion and if it were reclassified as D up to say 10k' then more people could mnake use of it.