As long as the player knows up front that the sorcerer is going to be pretty small potatoes in a game full of Awakened mages, and as long as you OK it, and take that character into account when designing your story, it will be fine.

That being said, Sorcerer characters can become very nasty pieces of work if they're prepared. Both the Alchemy path and Enchantment path allow a character to create items that mimic other creature's supernatural abilities to a limited degree. Alchemy 5 can duplicate any 3rd level power and Enchantment 4 can duplicate any 2nd level power. That opens up a lot of options for a powerful and creative sorcerer.