Well, to rephrase: If I'm in a shell corp I'm usually there because I don't have the time to contribute to a corp that I think the corp is entitled too, or not have the time to lead a orp of my own in a manner I would be satisfied with. In fact, I might drop out of EVE for a month, or 2 months, or longer, at any time.
If I want to talk to someone, especially for RP, there usually just one channel/eve-mail away.
If I want to talk to someone OOC, there are channels for that too.
If all you are doing if staying in the same shell corp is to have basically the same corp channel?