Regarding Nerfs and Buffs.

Recently with the new patch, RIOT has encouraged more competitive picks among other champions. Some nerfs, some buffs, whatever. But my question is why don't they buff champions that would see more action if they just received a few quality of life changes? Sona with her new rework is somewhat of an example in this, where she has altered abilities to fit the game more after being largely untouched for years.