How much of a prospect is Mr. Einertson?
With Einerston, the question marks on him have been centered on "makeup" (as in attitude, work ethic, et. al.). Einerston is from San Diego, so he also has an aloof attitude and is laid back. Sometimes that is mistaken as not caring. All are things that point to a lack of maturity early in his career and maybe a little growing up has helped him in his climb through the minors.
As far as having natural ability on the field, he has an excellent eye and swings the bat really well. He generates power well for a guy his size. But on the field on defense, he's still a work in progress. He is a left fielder at best, a DH at worse at this point in his career. Think Jack Cust clone.
I would not be surprised that Einerston would somehow be included in a trade sometime in his career with Houston (AAA or AA) to an AL club looking for a young hitter. Einerston has a ways to go to be the next Jack Cust, but that seems to be where he's headed.