Yes, there have been rumblings about this for awhile. I'm hoping that David Canary just wants a bit of a break, and will make some appearances down the road. In any case, it's a huge loss for the show, because he's an amazing actor, and has kept AMC interesting for me. Darn it.
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"It is our choices that show what we truly are, far more than our abilities"
(Dumbledore to Harry Potter)
I agree this is a huge loss for the show, and oh so sad with the recent Palmer loss. Although Moore you are right about the mumblings. Haven't people said this was why they killed Stuart?