Naturally, it's hard to say what's happened.
Here's another thought.
Morris has given so many talks that have been over the top shortly after the broadcasting started. I think they have tried to reign him in over the years or come to agreements to cover over things or did their best to ensure there was some damage control.
For instance, his tight pants talk was ridiculous but somehow it made it to the Watchtower sometime later and was watered down. They supported the stupid outrage but put a different spin to it.
I would think they've had a very difficult time dealing with his eccentric behaviour, either to minimise it or placate many JWs writing in or Bethelite's murmuring about it.
It may have just reached a peak where they can no longer work with him, he has a mental disorder where he can no longer be reasoned with on a satisfactory level.
I wouldn't be surprised if he had anger issues or was extremely stubborn. If he has a drinking problem this type of behaviour isn't unexpected.
It could be that the only option was to remove him and he has taken this really badly.
It would follow that they sympathised with his family and not him as his behaviour doesn't warrant it as he doesn't see anything wrong with it and doesn't intend on changing.