Honestly. I think Ahri has a lore contradiction, and a personality crisis.
Since we now know that Xayah/Rakan, Rengar, Wukong are Vastaya and have no problems maintaining their form without being a vampire, I find it totally unnessesary that Ahri needs to consume souls without any reasoning. Beforehand, we were told Ahri was a mere fox, but now this is not the case.
Ahri needs a lore overhaul to make things clear, that she has a very bad addiction or she has some sort of rare symptom that forces her to devolve.
Also I think what makes Ahri a distinctive character is that she "regrets" about taking a life for her selfish need to be sentient. Her lore update consists her trying to restrain, but ended up destroying a entire village into a souless husk in a single night. Her current voicelines really love tempting and sucking out souls which is very in contrast to the updates. She is now a very compassionate creature.
I guess this personality crisis issues was one of the reasons why Star guardian Ahri's personality and voiceovers were disliked by a quite a lot of people to be...erm "Bitchy".
The "temptress" side of Ahri now is something she finds repulsive, since she started to develop into something more civilized. And it needs to go out.
Especially when we have something like this new evelynn which is rocking badass on the temptress department.