With rogues the VVS does matter VERY much.
Hit rate for dagger rogues is kinda crap without extra items sometimes.
Also when double attacking a ranked VVS weapon adds 40 more damage. This adds up fast if you're raw DPSing as this class, which is what I commonly like to do with this class. :>
For knights/saders who can't hit high flee targets they can then bash over and over on said targets and cause them to stun. Then they can do decent damage and finish the opposition. :>