Ya you could say they left some meat on the bone but I am sure it is for some legal reason as to not put the boat over the "listed" weight or something like that and because it is cheaper to manufacture since it covers more than 1 boat. Like you said it really doesn't matter as it makes the wave come alive and that is what matters.
As far as reinforcing the divider panels I just went the easy way and bought 2 of the wake makers kits and installed them. Also from the factory a few of my panels had some small screws in the channel to keep the dividers from jumping the track so I went on ahead and installed some on the ones that didn't have them. Both of those mods have helped tremendously as my port side divider would jump the track 70% of the time with the stock bags.