Mathematical proof that Riot can't (or doesn't care about) balance.
Vladimir was having a hard time this season, having 47% winrate overall and 44% winrate above diamond. It was clear that he needs change (as a buff) and I was looking forward for it through this patch.
On April 8th, when Riot posted item update for patch 6.9, as math major and a vladimir player for 7 years over 3000 games, I did calculation for every possible build he can build (http://www.inven.co.kr/board/powerbbs.php?come_idx=3369&my=post&l=1495702, in Korean) Found all build are mostly nerf for vlad before remake. (Mostly due to removal of WOTA) So I was expecting him to be buffed a lot through remake.
When Riot posted the numbers on remade vladimir, I calculated his damage, sustain, and possible skill combos. (http://www.inven.co.kr/board/powerbbs.php?come_idx=3369&my=post&l=1500758) Also, in Korean The result was, 25% nerf in damage (sustained) despite more risky and unreliable playstyle.
His eq combo DPS throughout all levels decreased by 25%,
His lvl 6 combo got nerfed from 748865 (+3.06 AP) to 563803 (+2.1 AP + 0.025 Additional HP)
(has to have 2080 additional HP at lvl 6 to compensate, which is impossible)
His full build combo got nerfed from 1960 (+3.13 AP) to 12291775 (+2.452.93 AP + 0.05 ~0.1 Additional HP)
(5 HP based tank items needed to compensate basic damage nerf, at maximum combo and not practical)
His sustain became negative, and even with ult, the healing increased (without WOTA) only by 50%~250% (needs to land 5 man ult). Compared with vladimir before remake and with WOTA, he was healing -300%~170%.
Just through calculation for a few hours, I was able to see it that the change only can be a nerf. Riot had SEVERAL MONTHS to prepare the remake and testing through PBE, but couldn't do this simple arithmetic. As result, his kit is disastrously arranged and winrate among the lowest in league history.
It is just ridiculous that no one in balance team could check the numbers through high school math. Through this, it only seems that even if Riot wants to make balance better, they can't cause they are bad at math.