What someone is "worth" is at least partially in the eye of the person trading for them though, isn't it? Everyone in the league isn't meeting the demand you have set forth, so perhaps your valuation is too high. Getting a good pitching staff together requires a lot of bullets to fire at the problem. The more prospects you have, the more you protect yourself against busts. So adding one top flight arm (at least by prospect rankings) and another solid one helps to do that. For me, holding on to Dozier severely complicates our ability to contend again. We won't contend without serious pitching reinforcements and if the only ones on the way are our AA pitchers, that is taking an enormous risk. Not only in terms of how few of them we're betting on, but by how far away they still are. By the time those guys are up we're 3-4 years into our team control window with Buxton and Sano.