I didn't expect to see more than 1 page of replies and knew the majority would favor the current shorter matches. I can make all the arguments why longer matches are better--the GP final lasts 90 minutes, longer matches test not only skill but endurance, and BM is traditionally a mode practiced until players feel tired as opposed to GP and MR which traditionally are played once through per session. The fact remains that the majority of players are satisfied with the current system and 2-player competition has been traditionally about racing until recent years. In order for a change to come about, we need more players that train primarily in battle and understand why longer matches feel more rewarding.
In regard to the agreement among the final four competitors, it seems we have already agreed to keep the current lengths of 9 and 11. I hope that opinion will be different in the future as we are continually seeing the quality of battle mode players increase every year.