I suppose (I wrote without fully thinking) isn't it as a memorial accorded a unique title. For example, we would never commission an RCN vessel HMCS SACKVILLE as Canada's Naval War Memorial already holds that name. Is Arizona not in the same 'clique'?
As for Enterprise, I have been watching this on another forum for a couple years. There had been formerly a petition that even non-US residents were encouraged to sign. This other forum appears to have an 'older' more international clientele and there was much joy when the announcement was made. The only question now, will the USN run out of money before CVN 80 can be built?