Tesla Motors has had a rough couple of months. Shares hit an all-time high of $194.50 in late September, then concerns about the fires on the Model S crept up. Following that, third-quarter earnings were great, but concerns about selling more Model S units in the fourth-quarter hit the stock. Now, an analyst thinks Tesla’s woes aren’t just short term in nature, it’s a case of unrealistic expectations. Merill Lynch analyst John Lovallo, who’s been a bear on the stock and the company, believes the unrealistic expectations about Tesla selling so many cars in the future are likely to weigh for quite a while. “While these concerns may be valid, we believe an even more significant