I've had Morton's toe and had orthotics, which I gave up and just kept moving up sizes in shoes. This was years ago. Then once, in a race, I had my foot fall asleep and said "oh no". However, the next day, no problem in my older same brand shoes. I tried with the new pair and again, numbness. I sent the shoes back to Roadrunner, and they had a fit about "past 30 days" and I argued that something was wrong. About a month later they replied that there was a small tongue defect and couldn't believe that it would cause such problems. Sometimes it "is" just the shoe.
When I had Morton's I "did" switch to wide shoes for awhile eventhough they felt a little floppy. (also gave up heels during the day).