It's not unprecedented for the WTS to allow unwritten rules to be perpetuated through an internal cultural osmosis. Beards is a classic example. They have had to officially quell some of these such as the infamous white shirts for public speakers and disfellowshipped people having to sit at the back for example.
The fact that they have certain expectations for dress whilst engaging in "spiritual" activities is also hardly new and not exactly cultish or abnormal behaviour when taken in isolation.
I do think, however, that this particular counsel and, most specifically, the sanction for repeated failure to listen to the elders is something unprecedented. I've never heard of anything else that would preclude someone from being able to share in the ministry, especially given no other internal sanctions apply, such as typical restrictions on answering, giving talks and the like.
Participation in the ministry is something that is a requirement for those wanting to be baptised. It's considered a command from Jesus and therefore as good as a personal instruction to each baptised Witness.
The lack of transparency or clear guidelines to elders is a concern as it leaves them free to implement things anyway they see fit. I know a number of elders who will be rubbing their hands in glee at this.
Having looked a little more at the typical information on the history of the term "metrosexual" I think I can see why the WTS has picked up on this. A simple google search brings back lots of results that show a relationship to homosexuality. My personal opinion is that this is very blurred now with the passage of time however I think the WTS see a directly link between the cultural foundation of the term and it's evolution into the modern sartorial and groomed styling that is very common today.
I think it is this that they refer to when the CO's outline says "Since this sort of dress and conduct is popular in the world, some may not be aware of the improper message that their dress and grooming sends to others".
I will be very interested to see how this develops over the coming weeks. Will there be lots more talks on dress and grooming? Year ago, when the fashion was for baggy suits there was a talk about it at the CA. It just washed over most of the heads of the young people.
We have CO visit imminently. We also have a CA very soon as well. I am going to wear skinny trousers to the CA and on the Sunday after the elders have met with the CO and see if there is anything said directly.