Champions who rely on more than a single rotation for a kill, who thrive in extended teamfights, and whose kits reflect both of those things, are struggling. Continuing to buff damage and reduce cooldowns is not the solution, it's the cause. More damage, More abilities, More, More, More.
This patch was literally just filled with damage buffs. If you really think that's going to solve the problem, maybe you should look back at the past 4 seasons to see how much it isn't helping.