We do NOT have a problem at cornerback. Last week we actually saw Goldson playing like a safety should play which is self explanatory: being a safety net for the cb's. Unless there is a Safety blitz a good safety should have the CB's back every single play. Why do you think Brees is so great at looking off safeties? Why do you think Warner looked like a fish out of water? Because Dashon actually played safety.
What makes you think the Strong Safety doesn't need ball skills either? Lewis is a Vet and he does have pretty good awareness of what is going on. Mays back at SS would be a really big fast idiot that QB's love to play with.