I just don't understand how they can think Bolt of the Storm is bad on Jaina and Kael'Thas at 20 because it negates one of their core weaknesses, mobility, but then they can turn around and be fine with Li-Ming having that built into her kit from level 1. That BotS-like range can be talented into at 13. I don't understand the logic. Like I agree, Bolt is terrible and had to go, it's a get out of jail free card but Li-Ming needs to lose something, it probably won't be her mobility.
If Li-Ming didn't have Dominance, or couldn't pick it at level 4, this might be a different conversation. Like her range, mobility, how her trait currently functions through proximity and her burst damage would still be problematic but she would lack sustain. You actually might be able to chase her from a fight. They need to look at how Dominance and her trait function though, proximity alone should not be enough. If she doesn't secure the kill, they should not proc. If she only assists, then gets half the CD. Too much is free on her right now.
If she's consistently banned every game, they'll have to look at her kit.
It's gotta be possible to do this, but it could be tricky to implement. How long do you leave them on the PTR for testing? You definitely need more than a week, and probably more than 2 in order to give Blizz time to study the data, and code the changes. And now the question is do you test those changes on the PTR too? How many iterations do you go through? It's completely doable, but would probably destroy any hope of maintaining the 3 week/4 week schedule we've been getting for hero releases.
They do selective access to Legion's Alpha with top raiding guilds for raid tuning, they should do the same with HotS pros for major builds and new heroes. Just run a build by them and get some feedback. Some of these problems seem immediately evident, where a large collection of people go "wtf m8". I dunno what the impact would be on the content delivery schedule, but I've stated I would be fine with slower better balanced releases and others strongly disagreed. In the end we don't know what the knock-ons would be for content releases if they adopted this approach.