It will make it just like we have on tax laws and how it was on everything else until recently.
Based on how the Fed Court district rules on a tax issue assuming you appeal to the highest Fed Court for the district you live in, it would only impact you, but not nationally.
Then what may happen another Fed Court district may rule the exact opposite. So now you have taxpayers being treated differently based on where they live. That happens today believe it or not.
It takes somone applying for an appeal to the Supreme Court to settle the discrepancy. SCOTUS could choose to hear it or not hear it. Many times SCOTUS chooses not to hear it and your tax treatment is based on where you live. SCOTUS can only handle so many cases a year.
This happens with some tax laws because SCOTUS sees public policy issues as far more important than our tax laws.
So, we might land at a spot that birth right citizenship is allowed or not allowed by certain states or Fed Districts. And it would take SCOTUS hearing the case to decide it for the entire country. Or they could choose not to, but in this case I think they would.
This is exactly how the courts were intended to work. No Fed Court district or any lower courts in a Fed District should be allowed to rule for an entire country outside of their district or jurisdiction.
It may put pressure on SCOTUS to move more quickly. It also makes it more expensive for plaintiffs to take cases all the way to SCOTUS, if they will even hear it, that should perhaps reduce Fed Court shopping for a favorable ruling knowing the full potential costs of litigation and of course the precedent SCOTUS set today.