(1) BA should board CE/GGL/Premier before GCH/SCH in line with the way U.S. airlines operate
(2) On SH, the normal number of passengers with FT qualification isn't that high. There are very predictable and routine exceptions, however. But stop trodding out this 50%+ have FT thing. Its wrong.
(3) I don't see that many queues for FT. What I see is a lot of people milling about somewhere in the vicinity of the FT track. I don't consider that a queue and will generally not have a problem walking around such people.