The difference in impact of nerfs and buffs in ther current balancing
So when riot nerfs a champion, they slowly tone the champion down bit by bit over several patches. (zoe is the most ridiculous champion: nerf e trap set-up time by 0.2 seconds, q nerfs on pbe; Ezreal nerfs came through slowly: First to cleptomacy then afterwards nerfs to his q) But when riot buffs a champion it is going to be a ridiculous insane buff that leads to tremendeous increases of pick/win/ban-rates. ("Double-the-damage-of-brands-passive, nunu-buffs on pbe). Why can't riots balancing team buff champions at a moderate pace (slowly adjusting stats over several patches). And if you want to keep the fast pace insane buffs, then let the nerfs be at the same pace. There was no reason to do slight-adjustments to ardent censer over more than half a year when it was clearly that broken. There is also no shame in overnerfing a champion/item and then buffing him slightly the next patch.