I've been thinking about Sorcerers (and the way they just appeared out of nowhere for 3rd Edition) for a while now. (I find the way that certain classes vanish or appear during changes to D&D editions a bit troublesome. I like things to stay the same or be refined. Classes that come from nowhere require work to get them to fit into old adventures that were never written for them.)
Having said that, the Sorcerer concept itself is sound. If I was running a Spelljammer or Planescape game it would be fairly simple to introduce them as "spellcasters that have come from another place". In Dragonlance, I think it's a bit harder. But the word "Sorcery" has been used in Dragonlance since the beginning. It's almost like Dragonlance was begging for this class to be invented.
I think they work better as magic users in places like Taladas (where the Wizards of High Sorcery are not established).
I also think they would work well in nomadic cultures (alongside classes like the Barbarian).
I could buy into people thinking that people who spontaniously develop the powers of the Sorcerer class as returned clerics of Krynn's gods (in the time between The Cataclysm and The War of the Lance). I could even buy into some people developing Sorcerer powers via sheer strength of will and mistaking that for receiving the power of the gods.
I think that if Sorcerers are used in Dragonlance, as a fairly radical alternative to Wizards, it allows you to sell up the idea that Sorcerers are dangerous.
Is the Sorcerer class actually
more dangerous than the Wizard class? Probably not. But if you want to make the Wizards of High Sorcery believe that "Primal Sorcery" is super-dangerous, you can give out this class to some chaotic (if not evil) NPCs and have them blast the heck out of NPC commoners that get in their way.
Then you can also go the other way and have the Wizards of High Sorcery unfairly hunt down Sorcerers and attempt to press-gang them into joining their organisation.
I think that multiclassing, between Sorcerer and Wizard could also be fun, in a Dragonlance game.
Imagine a 3rd level Sorcerer being hunted down, bullied into taking The Test and then forced to multiclass into a Wizard (with Wizards of High Sorcery keeping an eye on the Sorcerer to see if they are levelling up as a Sorcerer).
Imagine if you run a game when High Sorcery is starting to fail and you allow all Wizards to multiclass as Sorcerers to try to use magic without the Moons of Magic.
Or, what about if you created a new Prestige Class, that required a PC to know both Wizard Spells and Sorcery Spells? You could look back at the writings about Primal Sorcery and use book knowledge and magical instinct to unlock abilities that seem like magical superpowers to members of the WoHS. Muhahahah!