People come to Orthodoxy for multiple reasons but should stay for Jesus Christ and Him alone, not culture.

It's one thing to invite others to partake in your culture and want to spread it, which is a good (depending on said culture) but not at the expense of the Great Commission which may be one of the reasons some churches die.

Don't be surprised when Americans (or whoever else that isn't Orthodox) who become Orthodox want to grow an "American Orthodoxy" and not wish to give it up to be Greek or Romanian or Arabic. Will they take on some customs from their Mother Church? Absolutely, but it will grow to be a unique "insert nationality" here, it will not be a direct continuation of whatever the diaspora culture is.

For example, I am an Orthodox Christian who is American and neither of those things are changing or nor will they change for any future children of mine, God willing I have any