I don't want them back. We've only just got rid of them. There's just no need. I liked when the Doctor dropped companions off and never mentioned them again instead of all these 'totes emosh' reunions!
They weren't always completely forgotten - there were nice little references, sometimes, like the scene in The Time Meddler where the Doctor's wishing Barbara were there to remind him of the history. That just gives a nice sense of continuity, but without the constant coming back we've had lately.