Actually, we keep addressing this issue because the same arguments keep coming up. Like the ones you bring up. We actually do address all of those things (limited use, characters switching as soon as they do one strike etc.) and no one seems to acknowledge that. In fact my entire point here was that you have an opponent in real life and if you are holding your saber reverse grip, you are at a huge disadvantage for all the reason in the video. You wont get just one slash and they are done. You need to parry and move after the blow and you can't do that well with reverse grip.
We await your video demonstrating its proper use in free play with lightsabers.
Its not exactly a sword technique in the first place, methinks. Take a thin handled knife, say 3-5 inches per blade, in each hand. Do punching motions. Blade becomes a potential augmentation of your normal strikes. Use it to cut someones arms if they block incorrectly. Gives you a few inches extra reach on the outer edge of the hands.
As for doing full on points sparring with a reverse grip. Maybe with dual wielding? One fore grip, one reverse grip. If you block with the foregrip saber, and twist your body and strike with the reverse grip saber? Not something ive ever tried, so i dont know.
To the people who mentioned something like leverage, or DN's supposed inexperience with trying to make it work. Leverage itself doesnt score points. You can have all the leverage advantage using your opponents own blade or posture or both, and still score nothing. One major thing that comes to mind, is if youre dual wielding reverse grip, and you successfully defend against a strike, whats your other saber going to do? If youre single wielding, how would you reliably recover your stance? If their strike has more force than your wrists can hold fast against? If the blade is pushed into your arm, i would think thatd be your opponents point. Not to mention, the reverse grip doesnt seem to be nearly as capable of rotating the saber around its balance point to block a quick strike to another part of the body after the first one is blocked. Theres an obvious disadvantage to flexibility and bodily coverage. I wouldnt suggest it in sport, i would thoroughly advise AGAINST it in a real fight.
If you want to kinda Jar Kai a normal length saber in foregrip, and a light dagger in reverse grip, and strike past their guard with the dagger? I guess try it, see how it works. US has 6-8 inch blades for the Flamberge guard, i dont know if they are as wide as the normal blade socket. Could take an initiate hilt, put one of those in, see how it goes? I imagine what DN is saying comes from experience. I doubt hes just pulling things out of his rear.