Did you really find out? If Shelton never constructs a lineup significantly contrary to platooning, how do you know whether it "increase[s] our chances of winning?" All you are really measuring is whether an ever-varying roster did better against R or L starters.
And the weird thing is that our best righty bats (Buxton, Jeffers and Keaschall) have had reverse-splits more or less, while most of the lefty batters have failed to clobber the same righty pitchers, amounting basically to a wash. Are the results an indictment of platooning, as I think you would have it? Or are they an indictment of the lefties themselves, like Wallner, Roden, and Gray who were or have been dreadful against RHP, and even Larnach and Clemens who have been good but not really clobberin' when the team needs somebody to be doin' exactly that on th' regular?