The Smash Bros Patch notes are pretty bad. There's so much not said there. The Smashboards forums takes their time to discover and document every damage change and other change with each patch.
Look at the difference for Smash Bros 4.
Nintendo (v1.1.5) vs
Smash Boards (v1.1.5).
There is so much information Nintendo leaves off the patch notes here that the fans of the Smash Boards had to work out on their own.
The Mario Kart patch notes are alright. Could be better, but adequate for the type of game that it is.
The Splatoon patch notes are alright too but not great.
All of these patch notes lack numbers and hard details.
Look at the patch notes for the Blizzard games.
Other Blizzard games have just as detailed patch notes. So much detail and all the figures are listed there. Nothing Nintendo has done comes even close.
In Nintendo's defence you are partially correct. The MK and Splatoon patch notes are not terribly bad. But they are not even close to the gold standard of patch note writers, that being Blizzard Entertainment.
I have done my research. I'm just sharing it with you now because you asked for it.
I'm not here to make you look bad. I am here to make Nintendo look bad. You did nothing wrong. It's Nintendo who sucks with their patch notes.