Dean Z writes something handwritten on most correspondence, so it doesn't mean you're a special snowflake, but it DOES indicate that she gives serious consideration to what's actually in your application.
Oh, and we need more of a Wayne State representation here. I think there are only 2 of us in the class of 2012 (that I know of). Having a strong state school presence allows me to lol a little more at the folks who paid much more at fancy private schools, only to end up at the same place (though I have lots of good friends here who went that route, so no offense to them).
Hopefully you put a lot of effort into your Why Mich.. I believe that essay can definitely make a difference if you show convincing reasons why you really want to be here and why you belong here.
However, retaking might be something you really want to consider, as others have said. You say you don't have the time to get into LSAT prep again, but if you really want it, you'll make the time.
sigh, i dont know if my why mich was that sweet...anyways if i dont get into where i want this year, i will retake and reapply for the next cycle
hopefully, i wont have to...maybe one of the big boys will bite...