It could be said to depend on how you define "better". Someone who has learned English as a foreign language might well have better grammar, syntax, and more precise pronunciation. On the other hand English has never been in its history about precision of grammar, syntax and pronunciation. It's evolved into the versatile language it is today because in the past native English speakers gave up caring about, for example, the convention of gender-specific nouns, "agreement" of adjectives (I think the only modern example is blond/blonde, or at least there aren't that many more), varied declensions of verbs (no more do you have to learn any more than, say, ten different forms of the same verb to cover all tenses and subjects ("be, am, is, are, was, were, been, being" is about as many as there are for a single verb, as opposed to the forty-odd forms of the verb "to be" in French:http://french.about.com/od/verb_conjugations/a/etre.htm ).