PSA: What is and isn't a QoL change

I see the term "QoL" or Quality of Life being thrown around a lot in these forums, so I figured I need to make this post. QoL changes attempt to change champion mechanics or playstyle for the better, while having a minimal impact on balance.

Good example of QoL change:

Gragas can activate his Q while the barrel is rolling, making the barrel instantly detonate once it reaches its destination. This allows the player to focus on other things rather than pointless reaction time micro and evens the playing field for high ping players.

Bad example of QoL change:

Gragas barrels aren't really doing enough, so his ratios and bases should be raised by 20%.

Good example:

Sona's Crescendo has new visuals on the PBE that more accurately reflect how the ability functions.

Bad example:

Sona has a hard time hitting enough people in a teamfight with her Crescendo to make herself useful, so the ability's hitbox should be increased.

I think you all get the idea. QoL changes should not focus on balancing as their primary priority, and should instead aim to minimize their effect on balance, although sometimes this is not possible.