Well, I was just thinking that for those that were less creative than others, or for new battlers, they could find a combo they might be able to use (although maybe for some combos there would be a level of experience needed to use them, as they may be really powerful).
Plus, it would make it easier for a ref if a combo was described for them, and then they can further interpret it into the battle.This is especially for new refs that may not be the best at interpreting things.
It could help other ASB refs as well. For instance, if some aspects of a combo described don't seem to make sense to them, a ref could perhaps consult the combo list to see if there is a combo of the same kind in there.
It would also help in the way that, if you aren't sure if a certain combo would work, you could post it in the combo list and it would be confirmed for use by an official or two.