What have evidence do you have that Des has improved his passing? Look I am a huge Des fan but he from what i've seen, he just doesn't have the arm/accuracy.
I would like to see McGuire get some snaps to see what he can do. If nothing else get him a little experience for next season. If the D is going to be as terrible as it was vs. USM, then we may only win 2 games anyway so why the hell not play two QB's?