Executive producer Katie Jacobs confirmed that they will rejoin the show in full capacity. Perhaps House will finally have to swallow some pride to get them back. "I don't know about that. I honestly don't know how it's going to all pan out. That'll be around show six or seven. We're a long way off that yet but I don't know. I guess so."
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http://www.canmag.com/nw/8923-house-hugh-laurie-interview She said this back in September, so they knew that they won't be bringing them back full force for a while. However, they also do not plan to axe them completely. I personally feel ok with this. This status quo makes me cherish Cameron moments and hopefully they will be better written since there are so few.
I like that KJ talks about their long term plans because maybe this means that even though they don't know how they will bring Cam back full force, but they know they want her to be there with House closer to the end. What do you guys think?
"They're glimpsed rather like a sort of Hamlettian ghost. They sort of flit through and the question is are they in my head or are they real." -HL
He was talking about the first time he sees them in season 4, but it sort of still feels this way