Please, when you are gonna change some things, only change that specific category.
If you are going to work on a defensive item dont also work on an offensive one. Same with champions. Doing too much over too many areas of focus will create more issues and problems than focusing on small bits and pieces at a time.
Love the ideas behind the MYMU. But if you had plans on reworking a bunch of champions and offensive items, then you should not have touched the defensive items. If you buff an offensive thing and nerf a defensive thing at the same time, that gap is far greater than one at a time and will produce skewed results. Such as buffing many burst assassins, high AP mages like
while also nerfing more defensive items like
and
. If one happened before the other, we might not have had to deal with incredibly overpowered champions like
and
who are unhealthily sitting well above the 50% ban rate (63% and 72% respectively).