I too want the series to move on rather than look backwards. I might change my mind for a few days if the 50th is awesome and Matt and David are wonderful together, but ultimately I say David had his time. I love him, but bring on Capaldi.
A few of my Whovian friends are still gnashing their teeth over Amy and Rory and want THEM back for the 50th. And I'm like....as great as they were, let's move on please.