I suggest you read the actual judgement from the court.
here
This article did point out that there were 3 related cases involved.
Finally we won one. The Democrat-appointed lower court really overstepped their bounds.
New York Times wrote: “The constitutionality of Section 5 itself was not at issue in the case, but the opinion said its intrusion on state sovereignty raises serious constitutional questions, quoting in part from a 2009 decision.
In his concurrence, Justice Thomas went further, repeating his view that Section 5 is unconstitutional. “
The issues of state sovereignty is almost insignificant in principle compared to the non-uniformity & discrimination of that act among the States.
For the Federal Goverment to make a law that only applies with burdens upon some states and not others is to lower the rank of those States & their people to a 2nd class status below others. Thus robing them of their “Equal Footing” and violating the uniformity clause of the U.S. Constitution.
If we are to be subject to a boundless(lawless) Federal Goverment, let us at least pretend that this goverment rules all States as equals.
It is Ironic in that section 5 inherently violates the very printable it was supposedly created to enforce equality among men. An irony lost in its consistency in that regard with the other acts passed & signed by the same corrupt men.