Both FR and GH have always had people described as barbarians and monks. It's just that 2e didn't have any special rules for those kinds of people (1e/Unearthed Arcana did, though), at least not in the core books (there was a Complete Barbarian's Handbook, and Faiths & Avatars had a monk class that was basically a priest with martial arts). Cleric domain spells are a replacement for the special abilities specialty priests got in 2e - if you check F&A, you'll see that one of the most common methods of giving powers to a specialty priest class was to give them a spell-like ability every odd level. So, those are just different interpretations of things that existed in the setting. When doing Dark Sun 3e, they added stuff that actively goes against the way the setting was portrayed in 2e.d4 said:but that has not been WOTC's method for updating any of their campaign worlds to 3e to date. sorcerers didn't exist in 2e Greyhawk or Forgotten Realms either, but the 3e versions of both settings have them. along with numerous other 3e-isms (like barbarians, monks, cleric domain spells, monsters with class levels, ad infinitum).
To clarify, I wouldn't mind overly much if they made Dark Sun clerics work like 3e clerics, only with a different set of elemental-themed domains to choose from (this is the approach taken by athas.org). It's not what I'd prefer, but I can see why they'd do that. Adding sorcerers and paladins is a different thing, because there are very good reasons why the setting doesn't have that kind of character.
And instead we lose what made those worlds unique and interesting in the first place. Athas, once a harsh wasteland where arcane magic requires serious study, gods and philosophies don't grant supernatural power, and where heavy armor both costs as much as a substantial fortification and is liable to kill you by heatstroke, turns into Greyhawk in a desert.it doesn't seem reasonable to me to expect them to suddenly change their methods and only do "direct ports" from now on with the other settings. i really like the changes that were made from 2e to 3e, and if all the settings were simply "directly ported" over, we'd end up losing the vast majority of the really innovative and IMO best changes to the D&D rules.