So this idea that somehow, by making wavedashes easier to execute your gonna instantly become a pro and do all this cool stuff you see on youtube, is nothing but an illusion.
I tried to say this myself but edited it out due to not fitting nicely into my post.
Simple execution means everyone can do everything. It means everyone can perform all the actions.
It does not let everyone be an instant pro. That's a stupid idea and, if anyone actually believes that, they're as dumb as it is.
What it does mean, however, is that the focus shifts from learning how to perform an action to learning how to use it.
When learning how to perform an action, nothing your opponent does has any affect on whether or not what you're doing is correct. It is a single player process and that, as any designer will tell you, is not what gaming is about.
When learning how to use an action, however, theory can give you a quick advantage, making it a great way to improve easily but, when it comes down to it, applying that theory and incorporating your own experiences in real game scenarios is where the real progress is made. Correct implementation is a situational thing that depends as much upon your opponent as it does yourself. It strengthens player interaction and adds gameplay depth.
Obviously, no action is solely about performance learning and wavedashing actually brings a lot of implementation learning to the game. The action does actually have a lot of benefit but here's the problem. It is not intuitive to players and it requires a large amount of performance learning to get to the stage where it becomes beneficial.
If you put too much performance learning into the game, players will give up before they get to the implementation learning. Not because they're lazy but because they simply don't want to play a game with no player interaction which, during that performance learning process, is what Smash is.
My desire to keep inputs simple is not for my benefit directly but rather a desire to have a Smash that the casual player can pick up and find welcoming, even as they progress towards a higher level of play. A desire to have more people drawn in to the tournament ethos, rather than pushed away by mechanics before they even begin.