To do that, they basically would have to schedule an extra person for all shifts. But after the end to my day, I'm all for that. Nothing like clearing the fitting rooms of all clothes, go put away some reshop and fold a few tables, come back and clear the fitting rooms again.....and find four tags stuffed into the pocket of the lone pair of pants in one of the fitting rooms. Grrrr.
A board would also help when friends and relatives bring in more clothes to the person trying them on. I can do pretty good with X went in with the guest, Y were added by Mom, Z were taken out by Mom, so the guest should come out with A, IF there's only a couple of people back there and only one has friends/relatives helping. Get half the rooms filled or two groups doing that, I have some difficulty with tracking the numbers. Being able to write "4+2-3" without scrounging for scrap paper or needing to walk away while the clothes flow is still going would be a benefit, if they do schedule a dedicated FR person.
But I doubt that the hours will ever be allocated to get that extra person without taking away from the rest of SL.