IDK, i really like the fact that Star wars uprising saved the nightsisters; personally I see Ahsoka, Kanan & Ezra running around 1 year out from ANH as more a blemish on the canon then something like 1 confirmed Nightsister surviving.

P.S. if I remember correctly, the Nightsisters never got fully wiped out in legends.

also if you hate the fact that story group has brought back the Nightsisters then your absolutly going to love that mount sorrow is back in canon... oh and Vader using Sith Alchemy & spending imperial resources to research the revival of necrotic tissue on Dandoran because he was still obsessed with Plaguies & the whole "To cheat death is a power only one has achieved, but if we work together, I know we can discover the secret.".... also your going to hate that palpatine imprisons force sensitives at his observatories and uses dark side of the the force to drain them of their life energy.