Anki definitely would still see play even after this nerf.
We still have enough good DARK "HERO" monsters in the game, both Drilldark and Decider are still at 3 copies, Malicious and Celestial are at 2 copies, and Vyon runs just fine at only 1 copy. For backrow, other than 3 Mask Change, just add cards like Galaxy and Cosmic Cyclone, Floodgate, WOD, and Canadia.
If Konami keep doing scapegoat hits like this, they will eventually have to semi limit every single good DARK "HERO" monster in the game, which is ridiculous.
Seriously, sooner or later they will have no choice but to hit Anki directly.