You're right in some of your observations. My post is 10 pages long and it looks like I lacked clarity on a couple things that I overlooked in proofreading. I'll try to address them:
* Even at our peak, when we had 2 active OPs with posting abilities (jringo and CM), we still experienced these communication delays with getting content out the door.
* The observation is that the number of active members being involved in the content vetting process would be reduced from the current 5 down to 2. 
* Breaking the system is what I would attribute to a Twitter admin abandoning the content vetting group and posting content of his choosing. Basically what I mean is, don't break the system that had worked well, and then point at its broken state as evidence for it needing to be changed.