As your statement is pessimistic doomsaying. I'll walk in hope while you wallow in negativity.
You are correct though, we don't know their developmental decisions or reasons and can either hope or condemn. I DO however know that if you introduce a new feature that uses bandwidth, you do it a bit at a time. It's a bad idea to just open the gates and just hope it doesn't break anything. This is what I base my assessment on.
Lets say the conversion of items to simpler flags of model, color and restrictions instead of tracking stats, soulbinding , and durability reduces the average bandwidth used by each player by 5%. Using this knowledge they may be able to adjust our glamour dresser to have a higher capacity since it uses less bandwidth. Once they know the server can handle it, estimates and projected numbers hold nothing on actual live implementation.