well i think the biggest reason, is that Laffey/Sowers/Cliff Lee were competing for the 5th starter spot in the spring, and as you well know now with his .40 ERA, 10:1 K/BB, 3-0 record, Lee won that job.
Miller has had blister problems, and if i recall correctly, last season a problem with a tendon in a finger on his throwing hand. He is without a doubt the most talented pitcher we have in the farm system. But the only thing I've heard considered with him in 2008, is the possibility of getting a bullpen job late in the season. That they'd like to get him a season w/o more injuries before asking him to start. And I have a feeling that this has a lot to do with CC potentially leaving in the offseason.
I don't know how either Sowers or Laffey are doing in AAA. Sunday I think, during the indians broadcast, they mentioned Laffey got the W with Barfield going like 3-5 with 2HR.
Ben Francisco did win a AAA batting title in either 2006 or 2007, hitting somewhere around .360. Memory is foggy on the average, but he can sure rake in the offensive cats, and lets be honest, Delucci and Jason Michaels combined make one decent outfielder. Someone needs to tell Wedge that platooning the two, doesnt equate to combining their abilities.