You can argue this is good or bad, but the bottom line is Ash and Kali being able to crack Mira windows, Mira becomes really weak.
Just about every game has and Ash and she will even be able to crack electrified Mirrors. Unless you have a Jager or Wamai on your team, Mira will be worthless.
I think its a pretty good change, it just means you’ll have to run a certain lineup with jager/wamai if you plan on running a mira strat. Plus ash’s ability isn’t that amazing, I would argue that it’s worse to give it to Kali since she can already destroy anti-breachs from behind a reinforced wall compared to ash’s 2 projectiles.