As usual, when Congress finally moves to address an issue, they manage to do it in the stupidest possible way. Permanent Standard Time is the better choice in nearly every way.
Plus, in Winter most people at best get off work around dusk anyway.
In addition, most studies indicate health benefits for standard time relative to both switching and permanent DST.
We tried permanent DST back in the 70s, and it sucked. We switched back. If we're going to make a change, it should be to standard time.