Well, it's now late June. And Carmona has an ERA of 3.12, a WHIP about 1.2, and K:BB ratio better than 2 to 1. He's also struck out 21 in his last 27 innings. He certainly has the pure stuff to improve his strikeout rate, but he'll never be a strikeout machine. He's only 23 now, and he was always a bit young at every level of the minors.
He was a highly regarded starting pitching prospect before being stuck in the bullpen last year, and he seems to be getting stronger as the year has gone on.
I had to chuckle a bit at a comment in this thread that compared him to Chien Ming Wang as though it was a bad thing. On a side note, Wang has also improved his K rate this year.
I'm working on acquiring him in my dynasty league, and while his price has likely gone up a bit from what it was, I think he's going to be worth it. Right now, I'm dangling Daniel Cabrera as bait and it might work out. It's a H2H points league (I'll never play in a roto league again), but I think he'll have strong value in leagues of any type.