Well, if you're starting to smell the wonderful aroma of burned plastic and fried electronics, I think it's time to look into a new motor

Granted, brushless motors can get pretty hot before they become physically damaged. But if you're running that hot to begin with, well, it's just not good for your setup, and the LAST thing you want, is for the motor to die while you're in mid-flight. Better to be safe than sorry. Align motors are supposed to be pretty good for what you get, from what I hear. Let us know how it goes