The new mode in one of the 8.x updates that allows you to have the control surface only show the channels which are not hidden is not a solution to thins, but helpful, at least. Maybe you'll get lucky.
Basically, if a track is hidden or is contained in a folder that is collapsed, the faders of the BCF will not align to them. So if you have collapsed all of the track folders except for the last one (for example), channel one on the BCF would line up with the first exposed track in that last folder. If you then expanded a folder above that one, slider one on the BCF would automtically move to control the first exposed track in the track view. If it so happens that you only have 3 track sin taht top folder, then 1/2/3 sliders would control the three tracks in top folder, and 4/5/6/7/8 sliders would control the first 5 channels of the other exposed folder.
Does that make sense?
To make that feature work that way, go to Options...Controler/Surfaces and then in that dialog, look across the bottom and you'll see "Control Strips Visible in:". Choose whichever view you want the faders to follow. My example above has it chosen in Track View. The old default operation is in All mode.
Hope this helps.