Gentlemen: The book is still open on Ellsbury. Given many scenarios, he might still be in the minor leagues. He is an exceptional athletic talent (blistering speed). Having said that, he clearly lacks experience at the plate. As evidenced by the "whole" in his swing with inside fastballs and questionable pitch recognition. These deficiencies are correctable with time and experience. Of course, this presupposes an innate intellect and ability to learn (as well as good coaching).
Give the young man some time to develop. My guess is that he will be a .290-.300 hitter with decent power for his build (12-20 hr) and as many sb as his average and on base percentage will allow (60-75). In the mean time, while it is frustrating to watch him fail at the plate, he sure can be exciting to watch. Have some patience.