Luiz, I'm with you there for the most part. Although I think nationality does matter in sport generally, I don't think it matters in the AC. Someone above said it's always been about nation vs nation, but that just isn't true, in the deed of gift the challenge is made between clubs. More akin to the world club challenge in football or rugby. You wouldn't expect Man U or AC Milan to be exclusively one nationality.
Anyway, if you tightened the nationality rules NZ would lose even more of its brightest and best overseas....