We gotta talk about Cassie
I've been meaning to discuss this topic for a while- The recent AI behavior and how it directly impacts Cassie in particular.
Cassie and her entire playstyle is built around charging her heavy- letting the AI attack or throw sps into it- and repeat. Charging her heavy build power stings, and landing the heavy will place them on the opponent. If the opponent attacks into her heavy, she will build extra power stings which effectively speed up her ramp and amplify her dmg output.
Notice how I said "If" in that previous sentence. Well that brings me to my point; with the recent AI behavior, they don't attack into her heavy at all. The AI will just stay blocking while she charges her heavy. Forcing you to either:
a) keep charging hoping the AI will dash in until her particles run out and she gets stunned
b) release the heavy early to avoid the stun, which leaves her open to being countered if the heavy doesn't connect (which it won't because the AI won't fricking dash into her, so you're getting hit regardless of the option you end up picking here).
That little rant aside, I will admit her heavy has multiple hits so she covers a fair distance and that sometimes lets the final hit of the heavy land on the blocking AI. That said, it doesn't mean she still works fine. Your fate is ultimately in the AI's hands here, whether it decides keep blocking or counter/dex your heavy. And most importantly, she's missing out on the multitude of power stings she could've built up had the AI simply attacked into her heavy (as intended, as her kit expects).
They really need to address and fix this as it impacts her overall performance in the game, not to mention directly nerfing her viability in BGs (by time stalling, leaving her vulnerable to AI unpredictability, slowing her ramp, and lowering her dmg potential altogether).