As a ticket office, clerk the look I get, when I begin to tell people the additional conditions of the Advance ticket, is one of "okay yeah whatever just give me the ticket", I don't believe that will change for the better with more information thrust their way.
The last time I bought an advance ticket at the station, (Hudds), the clerk went to great length to explain the terms of this ticket, even though I said I had used them before, I then had to sign a declaration, on the back of the seat reservation I think it was. confirming the terms had been explained to me and I fully understood, the travel ticket and seat reservations were then stapled together, I had to do this for both the outbound and return tickets, and can imagine the problems this would cause at busy times, both for the ticket ofice staff and the rail users.
On the subject of "advance tickets", have the numbers available been greatly reduced? I ask this as a couple of years ago I could get advance tickets for almost all the journeys I made, now though making the same journeys, at the same time of day advance tickets never seem to be available, the routes are operated by XC if that helps.