Not sure on the numbers or the prospects for Morneau, but I like what you propose here. I've posted the Peavy/Morneau/Hunter trio as well. I like the idea or at least something similar. It makes them very competitive next year without sacrificing too many resources moving forward.
We went 9-26 after the big trade. We have Middlebrooks returning and Lackey back. I seriously dount an over the hill Hunter, a seemingly rejuvinated Peavy, and an oft-injured Morneau is going to make us "very competitive" in 2013, but more importantly, they do nothing, with the possible exception of Peavy, to improve our longer term outlook.
If we are to make trades and signings this winter, as I am sure we will, I'd prefer deals for younger players with longer team control and higher upside. These players will help us be more competitive in 2013, but also beyond as well.