Ah, you ask a very interesting question (many questions actually.) I think it has been shown that if the original host met some demise for some reason and no longer functions, that a new host can take on the role. Of course adjusting so that you can enjoy good things, and create health would be no different or difficult than to do so to deal with the bad stuff.

I think if you are capable of taking charge of some things at least, then that is a good thing. Don't worry about who or when... you all are in control of the whole, and when it's time, it will happen.