It's just the general vibe I'm sensing from forum posts, podcasters etc. Not in the sense of he's a bust, but most everybody is already crowning the new SS golden boy (Made). Pratt is probably trade bait unless he moves to OF. Made is pretty much penciled in as the very near future SS. At 3B Pratt will / would have Wilken, Fischer, maybe Adams to contend with in that same near future. Williams seems destined for the OF, but maybe they have real plans for him in the dirt. Just a lot of competition swimming in the prospect pool not to mention the existing starters, and Pena too.
He is pretty young. Seems to me expectations were a bit high for him at AA. But to his misfortune, he has Made forcing the issue. Normally, I think most people would be quite content to let him play another season at AA, bumped up to AAA if merited. But as it is, he may very well be leapfrogged I suppose.