Fast-casual restaurant chain Chipotle Mexican Grill (NYSE:CMG) is known for purveying overstuffed burritos. Yet, some customers are reportedly getting less than what they expected — and Chipotle stock may be too richly valued for some investors’ taste.Granted, there’s a major event coming up soon that will affect the Chipotle share price. On other hand, it’s already public knowledge and many people have already taken a stock position in Chipotle. So, don’t assume that you’re getting a good value if you inve ...