The reason that I left, in addition to the reasons in my post on the CIS forums, was because Kasmage was gone for so long and nothing was getting done. (OOC: I can't blame him for spending time with his family.)
Zocane's nation was deleted, so that didn't really help matters either. :/
Gen is a great leader, but he just doesn't have the drive to lead anymore, as he stated in the OP. That doesn't make him a bad member of CIS; he was a GREAT member.
GE, our MoW, is nowhere to be found.
Roy McMann, Jache, Ptricky, and cellochik left for most of the same reasons as myself.
Just an update from a former member to clear up any confusion about why people left CIS.