I have to agree with Steve, the problem is that turning over D7's, Tutors one of the four bombs or acceleration in comparison to counter spells and lands leaves something to be desired, pun intended. That said, if your a total luck sack and aren't in an environment where Misdirection is "all that hot" it may be worth including (tho' I'd be so much more tempted to add Vampiric).
On an off note, does any one else think Hurkyl's and Chain are better than Rebuild and Truth?
I'm on a Rebuild and Chain. I dislike Hurkyl's. Chalice @ 2 hurts this deck a lot more than Chalice @ 1, and I want both of my bounce spells to answer Chalice. Rebuild is also better when you want to win through a chalice/rod/tangle wire, etc.