Biggest talent of the next quad is Sofia Akatieva. In every category.
I think as an overall she is the most impressive. But not in every category. On the contrary I'd say she's "pretty great" at everything but not "exceptional" in any, except for jumping difficulty, there I'd say she's probably first (most consistent with her quads thus far, pretty good 3As). If Zhilina gets consistent then I'd say Zhilina is the best in that category. Samodelkina is second thus far, but very close to Akatieva.
In terms of spins, Zhilina and Petrosyan both are better (if we go younger, I'd say Dzepka is up there too).
In terms of SS, the best are Melkumova, Krivonosova and Dzepka, but out of older the ones, Osokina, Muravyeva and Samodelkina are the best (Akatieva is up there too, I just don't find her as fast as the rest and I think her step sequences lacks a bit of power and flow. But I do see a lot of potential in her SS, her edges are pretty good).
In terms of jump technique or jump aesthetics, Zhilina is definitely the victor, with Akatieva second (her 3As are actually very impressive).
In terms of dedication to performing, Berestovskaya and Dzepka are the best IMO.
In terms of maturity, I personally find Samodelkina and Muravyeva to be more mature.
In terms of musicality, I think Petrosyan, Osokina, Melkumova and Dzepka are better as well.
But the thing is Akatieva is up there in all those categories, maybe I wouldn't say she's the "best" but she's up there. With everyone else they have one bulging weak point... so I agree that she is probably the best out of those skaters so far. (My personal favorites are Samodelkina, Muravyeva, Dzepka and Melkumova... if you couldn't tell). But, if (and that's a big if) Zhilina gets her jumps consistent and improves a bit in artistry (I think she has potential to be good in SS and artistry) I think she's the one that's most impressive. I mean just look at her 3A out of super difficult transitions, or her 3A out of a standstill, or her 2A without hands, or her textbook 4Lz or her amazing spins and flexibility.