I wouldn't go quite that far. We've had a policy of not killing foreign leaders since the 70's, and that policy still applies as long as we're not actively engaged in declared hostilities with them, like we are/were with the Taliban and Saddam Hussein.
As far as the CVBG, they were already there as part of a normal deployment. Ships belong at sea, period. The only difference is in the expended ordnance, nothing more. And if Qaddafi decides he wants to try to tangle with the US Navy again, well, I guess he didn't learn his lesson the first couple of times.