Well, They have to prove the the community their demands on balance are wrong some how right? Buff each release after demands about how TRASH AND WEAK they are
Let them be monsters for a bit, return them to closer to release power and publicly state "We did as you requested look how that works now please just let us do our fucking jobs."
Honestly for this years April first I don't want URF. I want them to make LOL be a single week where ranked is disabled and the games balance is adjusted every other day by community votes.
Anyhow odds are they over buffed her just to collect information on what happens when kai sa is to strong in a meta and player reactions, expect her to be put more in line in 2 weeks here. Riot tends to think in a much longer time frame then most the player base and is entirely comfortable collecting data they need/want from live. I have formed this opinion on riot partly from Preseasons and being a player from season 1.