I thought someone would never ask. This is the exact thing that I am trying to implement the MOST into my Ganon play, as I feel it will have drastic improvements in my neutral game, and even punish game.
I believe that DH to perfect waveland is actually a lot more useful than people think it out to be. Ganon's waveland is fast, so you want to use it a lot to move around right? Wavelanding causes 10 frames of lag on the ground, but that's a godsend compared to his regular movement speed. Now, you can't really just SH perfect waveland all over the place, but you CAN use it to really throw off your opponent. For example, in neutral, if you got a read that a Fox player is just gonna dash dance, You can short-hop waveland in and ftilt them to close the distance on them and throw out a hitbox. Of course, you have to do this at the right time, but I believe the reward for doing so is really good.
I see a lot of Ganon's currently double jump in order to get that perfect waveland. Yes, that is easier, but you use your double jump in the process, meaning if you get hit, you are going to be easily edgeguarded without a double jump. It also looks really obvious that you are about to waveland if you double jump in place really fast and go for it. By short-hopping before you waveland, you disguise your intention to perfect waveland right after, and hiding what you're going to do next is huge in this game. You can do a lot of things from a short hop, and most of the time it's going to be an aerial, so if your opponent expects you to come down during a short hop with an aerial and shields, then you can perfect waveland behind them and grab, catching them by surprise.
But wait, there's more. You can use the momentum from the waveland and transfer it into a jump or a moonwalk, and use that momentum to get a really far out bair for a gutsy edgeguard, or to get that last hit in for a punish when your opponent looks too far away. When Ganon is wavelanding, that speed is faster than his running speed by a good margin, and doing it perfectly means you get the maximum speed. So basically, if done completely correctly, you can move in the air as fast as Falcon can, and THAT is a scary Ganondorf.
Even perfect waveland into jab is really fast and can catch your opponent off guard. There's a lot of cool mixups you can do; the possibilities seem endless!
I implore all of you to learn to short-hop perfect waveland more consistently, as I feel like it will be a huge step in a much needed direction for the character.