That makes sense, but if the promotion ever happens, then there might be a bunch of old code using (compat racket ...) that would need to be converted, and we would have to keep the (compat racket ...) modules around for compatibility with old code. If there's any possibility that we will want to rename it to (language racket ...), I think we should do it right now, in the beginning, so that users of those modules don't have to change.
It's fine for language support to be incomplete. That's how (language ecmascript) is right now.
Best,
Noah