SSF while I generally agree with your observations and optimism about XB, I believe he would have been better off with a full year of seasoning in AAA. I realize that he would not have consistently seen the quality breaking balls and overall mastery that most MLB pitchers have. As you have said, and this is THE salient point when discussing him, XB is very young. He was pushed through the system out of need, not because he was raking at each level. The same holds true for his fielding. He was not ready with that skill set either.
I look forward to seeing him play in 2015. I hope that your assumptions regarding him having made THE adjustments are accurate. If so, the Sox will have an above average SS offensively. And one whose defense should become average.
As I have said many times, I have yet to see the "can't miss" aspects of his game. The 2013 post season was too small of a sample and he hardly overwhelmed at any point in 2014.
But, I am very hopeful that he becomes at least most of what has been projected for him. That would be wonderful because this franchise has not developed a very good two way SS since Nomar broke.
Time will tell, of course.