you have the right idea but having berkman kinda forces you to make this kinda deal, but I also don't care for Morneau. I would shop around a little bit to see if you could get a better deal. look at the rosters of the owners that have joey votto and kevin youkilis, if they have another outfielder that is comparable to Granderson in profile, like sizemore, ichiro, or werth, i would go for that instead. for giving up lee i think you can get more than morneau but that is more so how you have your rankings and how you feel about your players, it's just what i would do. the deal does have its benefits tho, especially since you are deep at pitcher and can take that kinda leap. i say u do the trade if you get turned down by similar deals for first basemen that are better than morneau. you can always revisit the deal if the other owner has the intent upon accepting it in the first place. good luck!
12 team, H2H, 6x6
OF-Granderson, Willingham, Ad. Jones
BN-Kendrick, Furcal, Stanton
P-Hughes, Clippard, Thornton, Dempster