Well, to be fair, they are not all real Hornets – the Super Hornet is really a different aircraft, it is a bit like the old Grumman F-4F Wildcat and the F-6F Hellcat, they may have some visual similarities, but they really are different. I do not know of any time in the past that the US Navy has aimed for a single type on a balanced air wing (during WW2, some of the escort carriers could embark an airwing of one type, but only for a specific purpose, then revert back to a normal mix of fighters, scout bombers etc).

It does make the carrier airwings a little bland though – they lack the character of the old Tomcats, Intruders and Corsairs/Skyhawks!