Two days ago, a reliable source, who has connections to personal acquiantances of AMIII told me the real reason: Health issues.
The thing is "health issues" really does cover a multitude of things, these days. Alcohol issues definitely comes under the rubric of "health issues". Even a clash of attitudes, if the GB decide to put the disagreement down to "stress"- and we know how good at compartmentalizing JWs are. Any perceived erratic behaviour can easily be attributed to "stress" and therefore be passed off as a health issue.
I still say that Anthony Morris is very likely a poorly controlled diabetic (and they are prone to do some very bizarre things...such as removing clothing etc). It's possible there was some inappropriate incident triggered by extremely low or high blood sugar. Now that's definitely health.