They built the F-Class capabilities into the electronic part of the scoring system, but not the visible target face. We've been able to select F-Class size scoring rings in the computer long before the first F-Class match was ever held.
So far, in the two years Talladega has been opened, there have only been five F-Class matches, and the preliminary schedule I saw for 2017 only listed four more. That may or may not be enough usage to justify the extra efforts to adjust the target face. Some competitors haven't needed it. Most of my buddies and I have shot our best F-Class scores ever there (both practice and in matches). The only available online scores show Brian Bowling shot a 598-35X in July. The target face didn't seem to hurt him either.
The bottom line is often supply and demand. How many NRA-approved matches are there in Alabama with the proper target faces?
Central Alabama Gun Club has four F-Class matches a year, not approved, but with the proper target faces at 300 yards. They shoot 40 shots for record and have 5 different time slots: 0900, 1015, 1130, 1245, and 1400. I greatly appreciate the availability of this match. But the 1400 time slot tends to have much different conditions from the 0900. Which would you prefer shooters shooting at vastly different times, or a non-standard target face?
I am also very pleased with the four mid-range prone matches in 2016 at Reese, and I am hoping they have at least as many at their five target facility in 2017. But the capacity here is limited, and there is definite more demand for F-Class matches than the eight matches outside of Talladega in 2016.
Ultimately match directors tend to take suggested improvements more seriously from folks who are showing up and shooting than from keyboard commandos making requests from afar which may or may not increase participation.
The F-Class matches at Talladega were increasing in attendance so quickly they can probably safely ignore suggestions from shooters who are not participating. Everyone agrees they gotta fix the electronic target failures. The expected increase in attendance from the added time, trouble, and expense of visible scoring rings is likely not worth the effort, at least in 2017 while they are working hard to accommodate growth and ensure reliability of the electronic scoring systems.