Agreed with the above from
@Remathilis . There's so much even from the old Dark Sun lore (or lore from any setting you care to name) that was nonsensical or bad and which people just glossed over or ignored at the time. It's easy to look back with rose-coloured glasses on this stuff. I don't want to see surfing druids or biotech halflings in 5e DS, I'd very much like the events of the later Prism Pentad books to be ignored. Kalidnay should never have gone to Ravenloft. Muls being the result of a breeding program that inevitably killed their human mothers is ick. The original explanation of what the Black and the Grey were, or how exactly sorcerer-kings granted spells to the templars, etc etc - they were a mess. But all this is classic original 2e stuff.
When doing a remake or reinvention you always want to take the gems from a setting, preserve its essence, remove the dross and the stuff which makes modern-day audiences cringe, and polish it up with some quality new material. Unfortunately, all of these aims are subjective, and on top of that, how you achieve those aims is also going to be subject to equally subjective judgement from an audience of widely varying opinions. I know lots of people who like the VRGtR reinvention of Ravenloft, and I can acknowledge that it is both true to some of the very oldest original Ravenloft lore, and that it succeeds very well in achieving what the developers aimed to do. But I still deeply loathe it, and think it took the setting in the entirely wrong direction.
You're not gonna win them all. Someone out there has probably played an awesome memorable Dark Sun game as a surfing druid and would be gutted if 5e DS cuts out the Last Sea.