When the run group order was posted early, we'd get people coming to the trailer early asking if they could change their order mostly so they could leave earlier. It is pretty crazy busy in the trailer in the morning and this created more work, time used, less balance of the amount of cars in groups. If it wasn't posted early, it was just crunch time and usually nothing could be changed.
Saving $$ is good too, especially this year! If the Registration team decided to save club $$ in color printing and paper, and post the run group order early, an absolute no-change policy with regards to run group order may help.
I like the convenience of having a pocket reference, but the old system does work.