I hate to say it, but ZOS is so good at releasing extremely vague information of an upcoming "product" without actually giving details...Saying we have a new class, but not actually previewing it prior to sale is poor business IMO.
Why would I buy something sight unseen? I would be 100% more inclined to pre-order the new chapter IF I actually had more information on what I am buying. When is the actual release of information (Class structure, Gameplay video, etc) going to be released for the consumer to make the decision on purchasing additional content?
I can't think of any other company that would withold information on a product this close to expected launch....