I think this announcement is more about what it doesn't say than what about what it says.
The terse wording, without any praise or thank you for Tony's long and prominent service screams that this wasn't an honorable discharge; the fact that they are letting time pass without any explanation is also very telling: they know how the speculative rumor mill works and they know that Tony's reputation is being trashed by the minute and Tony knows that as well. So this silence without explanation also reeks of punishment. Clearly the GB is invested in destroying Tony's reputation by letting the rank and file JW think that this is "Jehovah cleaning his organization" and that Tony became a rotten apple that needs to go. By calling him "brother Anthony" they are telling him that he can still salvage something, but this is probably act one of a tragic full demise in shame of Tony Morris.
What led to this? Nobody knows - yet - but I suspect we'll find out soon enough as act two unfolds within the next two weeks.