Well, I for one will be glad to see Matt go. I never warmed to him as a Time Lord. I think Capaldi's gonna be great in the role and bring some new blood to what's become fairly stale story telling. I only hope Moffat recognises that.
"The Doctor is regenerating"
Hell, normally it's a quiet family affair with just companions (or even alone) and usually after the adventure is over.
Maybe Matt won't "save the day" this time, and Capaldi will do it.