The back dash change is good. I played against a very exceptional ninja who rejected most reads with back dash, but there were very few moves that could be blamed for it despite I almost perfect reads.
Reworking backdash was the right decision, especially for Ninja, backdash in the beginning was a very safe and effective play with very few countermeasures.
If my opponent whiffed something, I got frame advantage, and if they didn't do anything, I just threw a shuriken.