1) The update has definitely not balanced anything, the META has narrowed. That is the opposite of balanced. Most characters have been debuffed. The ones that were META before and were not, are now way overpowered.
2) Now in Arena, if two teams with maxed out characters face off, the one with Royal Guard will win 10/10 times. Insane Protection + Health + Ability to Stun and Taunt. RG was already top of the META, now he is God.
3) When you're playing at a high level any character less than 7* 8 level gear is almost useless. So when most of your characters get debuffed (comparatively to the rest) it's a big deal. And having to adjust by building even just one new character to a useful level can take months..
4) The game has always required a lot of grinding. The update now requires even further grinding for the same small rewards. i.e. almost every player vs. computer option has gotten harder and more time consuming and there was no need for that whatsoever.
5) EA, why couldn't you just increase health for every character by a percentage relative to their slowness and leave it at that This would have accomplished the goals of balancing against speed and characters being killed too quickly. Why introduce a mechanic that makes grinding even worse teamed with debuffs that make player vs. player even more unbalanced.
I don't need more time, this update is garbage. :|