This is about preventing future administrations from abusing executive authority by declaring emergencies. Wouldn't affect the current emergencies that have been declared.
As he should. A big part of this problem is due to the fact that too much power has been surrendered by congress. I'm sure that's why Lee and Paul voted the way they did, but it's still shitty timing.
Redundancy is worthless if the "config change" was done intentionally, because it would've likely been applied to all of them.