In reply to AndyRoss:
Just looking in my new guide there are a load of new routes ( probably some are old routes just more fully recorded ) and grade changes at Vallorcine. Loads more than in Rockfax or the older Vamos guides
The pair of 4as you mention from the older guidebook are now 4cs. These are left of the low level overhang which pitch 1 of Crocs goes up. To the right of the pair of 4as you mention is a 4c 'Superman' which tackles the overhang at the low left end. Next right is a 5a 'Batman' which is just left of Crocs pitch 1. Crocs pitch 1 is given 5C ( personally I think it is easier than this ). Right again is a 5a Diedre Fleche that follows the, well, left to right leaning diedre. A route branches left off this over the overlap at 5C. Hope this helps...