As others have stated, Tesla will not likely drop the price soon, if at all, for the difference in range. That extra $$$ should be going towards Tesla's expansion efforts -- more SuperChargers, upgrading to v3 SuperChargers, Model Y, new Gigafactory in China and Europe, etc... They have a LOT of stuff coming up on their plate, and they need to be cash flow positive. There are so many people lined up for a Model 3 worldwide that there is no way they run out of customers willing to pay that $9k premium anytime in the next couple of years.
Until they get real competition with similar class of cars, similar features, and ranges, but for cheaper prices, then they should not be dropping prices just because they are getting higher margins. They should be shoving those profits back into their business to expand.