The appeals system timelines need to get sorted but your question above is the more important question. As best as I can answer it we built it when there was more of a supply and demand issue in the 80’s and also a time when there was great concern about people being able to get unfair advantage.
The CAO very effectively dealt with these issues. There was a massive increase in the number of college places from the 90’s on and many of the supply and demand issues for many courses went away. By then an industry had grown up around the CAO system. I think the CAO could set up a parallel system which would allocate places based on 5th year results or something similar. Courses could be migrate to this system if it suited their needs better. In many cases it would. That would leave a few high demand courses in the current system.