I approach the minors a little differently from most people (yeah, duh on that one I know). For me to be down on him a player has to prove to me that he doesn't have what it takes. Strickland had done OK for himself in Greenville, he has a good fastball, and he's only 20 YO. Until he proves otherwise, IMHO he's viable.
Also, I tend to take these positions at least partly because everyone else dismisses a guy like Strickland completely, which makes me want to defend him. The truth is, as usual, somewhere in the middle.