the show is obviously much more interested in making it about the Mitchells, than it is about Paul and his family, sure they are giving Les and Pam something, but its only as part of their exit, and Pauls death has first of all been a fake out death for Ben, giving Phil, Ian and Kathy something, and then its about Bens attack, how his family reacts, and finally how Ben deals with Pauls death.
It is very much the case, of a death of a supporting character, not really about them, but about how it effects the main cast.
In the end, (and ive said this before) DTCs only successful new characters had been the Carters, the rest will likely (or have been) axed by the new producer, and no one is really going to miss them.
I could see Kush and his family sticking around, but really that is it.