Class-wide updates should never have been a thing.
It created an expectation that there had to be a large amount of changes to a bunch of champions each season.
It didn't matter if the changes were cheap
Or low quality
They just had to shove the changes out there because they wanted waves of new people to be interested even at the cost of small groups already invested in champions no one complained about en mass.
Eventually they're gonna slow down, run out of ideas, or massively recycle shit...
And the community will be there to complain about Riot not bringing out more content
Because by that time, they'll be so used to massive changes, it won't matter how good the quality is because it wasn't as much as before.
...
There was nothing wrong with releasing a champion, releasing a skin, or updating a champion who actually needed it here or there while trying to balance out the game.
TL;DR Quantity over Quality at Riot Games