I actually replaced my Mr/level blues and CDR/level blues with mana regen / level blues. Even with the highest base mana regen, they act as a 50% boost. With Lissandra having the lowest mana regen, they act as nearly a 100% boost.
Also, Ryze who probably benefits most from the RoA change is in the bottom 10 for win rate today.
The item changes to RoA, tear/AA, and zhonyas was absolute trash. Those items were fine, but Riot just nerfed them seemingly randomly. They should have kept all the old items the same and simply introduced the new ones.
If the AD itemization changes received the same kind of treatment the MYMU did, PD would only give you AS when you were hit, IE would have its AD nerfed and its crit damage passive reduced to 10% bonus damage, AD would be nerfed on nearly every single item except for ER, and every item change would give you some useless passive while gutting the stats.