It's weird how the assumption from some is that unless the setting is perfectly matched to the fans' tastes (as if we're a monolith...we're not), that the fans would then go after Ajit personally. What a bizarre assumption. As if there's some unspoken assumption there about the fans.
I'm a long-time fan of Dark Sun. If Ajit can manage to get them to even consider it, that's a win. If something gets worked on, that's a win. If Ajit manages to actually get something published, that's a win. I'm sure he'll do the best he can with whatever restrictions he'd be given. I'm also sure that he'd do a much better job of it than any full-time WotC staffer. I would buy it sight unseen just as I have every other Dark Sun product I've come across.
(Though in my heart of hearts, I'd much rather Ajit work on a new setting, preferably something Indian-inspired.)