The wisest thing to do with GT's is to scrap them all but that won't be too popular, unfortunately.
So now, my more pragmatic suggestion would be to get the
Tour of Spain back to May, with 17 stages + ITT prologue (if they want to, but if they don't want any prologue, it should remain 17 stages, the in-line stage can replace a prologue) and the Tour of Italy back to June, just like in the old days (and them also cut to 17 stages + prologue, would make my day, a sweet revenge for Verbrugghen's destruction of the classics

).
If beside all this, the ProTour is scrapped, then the Tour of Spain would be what it always was, a good race for young Spanish talents to get experience and for some GT riders to have a good prep for the
Tour of Italy. The classic riders would then skip it and race the classics in spring + the other classics in autumn while in the current context, they are forced to race the Tour of Spain as a prep for the Worlds. With my solution, they would all have to race, either the Canadians, or the Euros (Wallonia, Fourmies, Paris-Brussels - which should get its real route back, of course -, Plouay, etc.)