When trying to decide on what buttons to use for different maneuvers you should practice your maneuvers with different inputs and see which way you can do it best. One thing I've been trying to work on recently is switching my L-cancel input from L to Z so that I can't mess up and full press L (thus losing my tech option temporarily). It's naturally uncomfortable for me, but I know if I master the movement my play will objectively be better.
I use Y for all of my jump inputs, but when I was learning to SHDL I still tried to use tap jump to see if it would be better. I was able to perform one using the control stick sooner than I could using Y, but I realized that I would only be able to do them consistently while I was standing still if used the control stick to jump, so I practiced my Y->B sliding motion more until it was fast enough for me to SHDL.
Another random tidbit about my experience with selecting the method best for me for inputting button presses: I used to play Marth when I got started with competitive melee. Marth's standing grab is much better than his dash grab (except for getting "reverse" grabs, if I recall correctly). Because of this, I needed to be able to JC grab, which I did with Y and Z. At the time, I only used my first finger to press both R and Z, and because I wavedash with R, I had to move my finger back and forth a lot. It was messing up my wavedashing, so I had to teach myself to grip the controller differently, with my first finger on Z and my middle one on R. At first I couldn't wavedash anymore, but with practice I was able to fix that.
My experience with learning techskill and honing my movement has been that practicing my inputs "in the lab" is the best way to improve. If you spot a flaw with your choice in buttons that could be fixed by pressing buttons differently, you should fix your inputs sooner rather than later, even if it's a little uncomfortable at first. If you practice a movement enough, your muscle memory will make it comfortable for you eventually, even if it doesn't feel that way to begin with.
