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It was admagic who said that the CTR of campaigns is part of the calculation for deciding bid price of a keyword.
I suspect he is right.
However, if you start moving adgroups into a new "top performing" campaign, then initially you will lose all the good CTR history for those adgroups & keywords. So you will lose out initially but over time it might be a sensible move as the price in the long term will reduce.
I would probably suggest pruning out bad adgroups from campaigns in the same way I would suggest pruning out poor keywords form adgroups but I'm not sure I would more great adgroups into a new super campaign.
As for pausing adgroups, I'd be interested in other peoples take on this. Since deleted adgroups and campaigns still appear I imagine either Google still uses the previous information on deleted and paused. However again I can't believe it has a great impact either way.
Hope that helps.
Mike
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