I've always interpreted low magic being less about what the PCs have direct access to and more how common magic is in the world that the average person can both witness and make use of it in their daily lives. Krynn is "low magic," at least during the Age of Despair, on account that divine magic is really only just returning to the world and the only significant arcane organization of note more or less gatekeeps access to more powerful spells beyond the dabbler level. There's also the fact that during the Chronicles many of the powerful items the PCs got were named artifacts with stories behind them, which at least gave the feeling of magnifying their importance in the world.
As for Shadows of the Dragon Queen, I too got early access to it, and one of the new features it does is that the Dragon Armies can outfit their soldiers with weapons imbued with the breath weapons of dragons. In the Red's case, the stat blocks for Dragon Army Soldiers have weapons which deal +1d4 fire damage on top of their base weapon damage and STR/DEX bonus. In prior editions, the rank and file baddies only had mundane equipment, and only the Officers had a chance of possessing magic weapons and armor.
So much like Ravenloft, 5e Dragonlance is making magical stuff more plentiful in the world. Then again, the Dragon Armies were always a higher-magic civilization in a low magic world so this isn't that drastic of a change IMO.