I like the idea of getting Miley. I don't really care what number you care to slot him at -- a rotation of 5 Wade Mileys would make us a strong contender, and given his age, heavy ground ball profile, and history, he's IMO more likely to overperform than to underperform over the next few years.
Instinctively, I still don't like the trade, because I'm still really high on Rubby and suspect that the better of Webster and DLR will end up being a very good starting pitcher, and also because it comes at the opportunity cost of figuring out which of our younger pitchers should end up with a rotation spot in the long-term. I'd be more comfortable with the trade if the rotation ends up being Miley, Kelly, Buchholz, and at most one more experienced pitcher, leaving one or two spots open for rookies depending upon the quality of Buchholz early in the year. If we end up getting two experienced starters, I really hope that Buchholz leaves as part of the acquisition cost, because one of the major goals of the 2015 season as an organization has to be figuring out which of our strong AAA rotation are keepers as starters, which are keepers in the bullpen, and which have no long-term role with the Sox.
Having said all of that, both Webster and DLR have been frustrating at times while showing potential, and at age 26, it made no sense to keep them if they weren't going to have a major league role this season. So, if the talent evaluation is that neither one was going to break camp with the Sox, then this is a good decision -- I'd really like to have thought we could get more for the two, but I also think we have a keeper in Miley.