I too would like a reset back to the first boxed set as much as possible.
Here's the thing though. There are things that I know were originally planned for by the creators, like halflings being the creator race of all life, that many don't agree with or at least wish was left unrevealed mystery. It wasn't revealed in the original material but was revealed later. The history of Dark Sun is supposed to be lost for time and putting it out there for players of illiterate ignorant oral tradition savages to amazingly know more than the oldest of beings, in a society where signs of literacy can earn enslavement, was just dumb.
And there are things that weren't designed by the original co-creators, didn't appear in the original boxed set, that most seem to love. Avangions and para-elemental priests. If we reset to the original boxed set I personally hope that a 4e Dark Sun take avangions out and shoots them and buries them in a well, Dark Sun doesn't need fooffy angels. And Dark Sun should scrape the paraelements off the hull of the setting as well like the unneeded boring baggage they are, they were tossed in because of compulsive symmetry, not because the setting needed them.
Those two things weren't in the original design, weren't in the original boxed set, so if we get a reset that removes those, I'd be pleased to have the halfling history be restored to an unrevealed mystery.