Kung Lao's backdash is fine.
There was one sequence in a tournament match between Foreverking and Michaelangelo, where they both kept backdashing and b2ing with Quan. It was obnoxious even with them only being able to do it a few times.
Backdashing is really strong, even with it taking half of your stamina. They've nerfed basically all guaranteed pressure, so you can backdash out of pretty much everything.
I didn't play the two games that came before. Maybe you could infinitely backdash on those games, so people think that it's okay? I've talked to people who were good at MK9, who actually complain about the lack of iframes on wake up. I'm assuming the people asking for no stamina tax on backdashes, just don't want change, because it's not what they're used to, they don't want to give up what they were good at, or they haven't been exposed to optimal backdashing on MKX?
Sorry if i'm offending anyone. I just don't understand.