So basically what you are saying is nothing changes?
And, why are you using the phrase "rotten boroughs?" Seems kind of suspect.
https://en.wikipedia.org/wiki/Rotten_and_pocket_boroughsA large noncitizen population implies that the municipality will have considerably fewer eligible voters than it ought to.
Trump was denied 2 electoral votes by this error in apportionment (fewer than I thought when I started the map). Although insignificant, they are a few scenarios where it might have made the difference.