English is an amalgamation of several languages and even though that makes it have a lot of strange rules it also gives it the greatest amount of vocabulary. You can describe a multitude of things in many eloquent ways. It's a very intellectual language.

But yes I agree with you, I don't see a reason to change our current lack of a national language. I see it more as a sense of pride that we're the "Melting Pot" of the world and theoretically accept anyone regardless of heritage or language.