They're delaying it's release because they can yield more money from you if they do. If you view this at a stragetic point of view, you can clearly see that they have you dreaming about clan ops, and you can't wait for it to be released. It's going to be so anticipated by so many, and very soon after much anticipation has been built, they will sell it to you as a game mode for MW3. It will not be free for anyone (including preimum elite members) and all must pay 4000 Microsoft points. You will be buying this, while complaining about it on these very forums. Beachead will be happy. Your wallet will sad.
