Any more of an oddity than the non-Latin churches? Granted, those communities tend to be more insular and are not even generally known among American Catholics, but I don't believe their membership in the Church is an oddity.
Theologically, ecclesiologically of course the Uniates etc are not oddities. But "on the street" they are, and I really wonder how seriously they are taken in, say US Church policy decisions and thinks of that kind.
I readily confess to being out of my depth here, so I also wonder how much it would matter if they were the kind of sociological oddity I am contemplating.
I think it is the same way with the Pastoral Provision and will be with the Personal Ordinariates. I don’t think most cradle Catholics are even really aware of them, and if they are, aren’t sure they’re quite “real”, nor are sure that receiving there meets the Sunday Obligation, not that they really care about that.