oreofox
Explorer
While I am not a fan of what came after Dragons of Summer Flame (wasn't really much a fan of that book, but it wasn't terrible), I liked what they did with the 3e Dragonlance books, including the content made based on the post War of the Lance timeline. I'm not sure what timeline you were going for with your conversion, but I assume the official one if you have a form of mystic as well as sorcerer. From my memory of reading the 3e books, they have good aligned draconians made from chromatic dragon eggs.
As for your other races: I'd personally build the draconians off the dragonborn, make the evil dwarves use the duergar from Xanathar's, and I believe there's a derro race write-up in another book, and modify to fit how you see them. You also don't have the Dimernesti/Dargonesti sea elves. I'd go with the aquatic elf write-ups in Mordenkainen's, but add in the ability to change into a sea otter (dimernesti) and dolphin (dargonesti). If you wanted to add in those elves as a playable race for your write-up. Other than those, I think you've done a pretty good job.
As for your other races: I'd personally build the draconians off the dragonborn, make the evil dwarves use the duergar from Xanathar's, and I believe there's a derro race write-up in another book, and modify to fit how you see them. You also don't have the Dimernesti/Dargonesti sea elves. I'd go with the aquatic elf write-ups in Mordenkainen's, but add in the ability to change into a sea otter (dimernesti) and dolphin (dargonesti). If you wanted to add in those elves as a playable race for your write-up. Other than those, I think you've done a pretty good job.