Would this upscale the Espada then?
Actually, this wiki unnecessarily underestimates the Espadas. If you ask me, some Espadas are strong enough to fight Elite Quincy.
Since it's stated that Shunsui's power hasn't increased, there's not much difference between his Starrk fighting form and his form that overpowered Post-Aushwalen Eye Patch Lille Barro.
Starrk => FKT Shikai Shunsui => TYBW Shikai Shunsui > Post-Aushwalen Eye Patch Lille Barro > Pre-Aushwalen Eye Patch Lille Barro > Bambietta, Liltotto, Bazz B, Cang Du, etc. low-level sternrriter.
I don't think Toshiro surpassed Halibel except in his Adult form in TYBW. Maybe Gerard's fight kid form surpassed him, but it could be argued that he was an outlier. In the novel, we learn that Base Halibel > Base Liltotto. The Base Liltotto here is stronger than the Base form in TYBW because he ate PePe. Even before eating PePe, he had some very good feats. Volstandig Bazz B was subjected to Bazz B's attack while he was without off-guard and Blut Venn, and this attack was so insignificant to him that he didn't even care about it, let alone take him out of the fight. Although Bazz B didn't intend to kill him, he wanted to take him out of the fight. Otherwise, they would also share the reward of defeating Ichigo. Bazz B, who one-shot Toshiro, wasn't in his Volstandig form. Yes, he used his two-finger technique, but even one finger technique was enough to overcome Toshiro's durability. Bankai Toshiro is only 5x stronger than his Shikai form. This still won't be enough to overcome Base Halibel. Furthermore, Toshiro defeated Base Cang Du, not Volstandig Cang Du. If Base Bazz B > Base Cang Du, I would assume this also applies to their Volstandig forms.
Base Halibel Su technique AP>Base Liltotto with blut venn Durability=5x Base Liltotto with blut venn Durability>Base Liltotto's durability before eating Pepe>Volstandig Bazz B with 1 Burning Finger AP>Base Bazz B with 1 Burning Finger AP>TYBW Kid Shikai Toshiro durability.
I also disagree with Toshiro scaling Mayuri. Mayuri didn't expect this attack because she was relying on her medicine. Also, considering Toshiro's anti-feats, scaling a character who has a feat against Pre-Aushwalen Askin level statement and Post-Aushwalen Pre-Evolve Pernida would be inconsistent. In that case, you would also need to scale Cangu Du against Post-Aushwalen Pernida.
Grimmjow says, "If I had used 'Resurrection,' I could have killed him (Hikone)." Base Liltotto's arrows couldn't damage Base Hikone with Off-guard Blut Venn. Considering Grimmjow also damaged Blut Venn Askin, he's strong enough to damage almost all non-Elite characters as an AP. I think he could take down everyone except Gremmy, Royd, and Leyod. Even Shinji considered using Hollow Mask when he felt Base Grimmjow's power. He didn't, but that means he wasn't entirely sure he could beat him even in his current Shikai form. I think Shinji was at the same power level throughout all seasons, but even if he increased his power, we should all agree that it wouldn't be enough to defeat the entire Espada.
Nel was relatively strong compared to Halibel in CFYOW. You could also argue that she was stronger than the Quincy girls other than Bambietta.
Luppi was also strong enough to fight Grimmjow. It's important not to overlook the fact that this form is stronger than his zombie form in TYBW.
There are statements and feats suggesting that Baraggan is still stronger than Grimmjow. Grimmjow and Luppi hit Sealed Ikomikidomoe with their strongest attacks, and Ikomikidomoe didn't take much damage. They also thought Baraggan was stronger than those two.
Baraggan ~~1000 Years Ago Ikomikidomoe > Sealed Ikomikidomoe > Desgarron + GRC =>> 10X Grimmjow and Luppi Base Cero AP > Grimmjow and Luppi raw AP > Askin'in Blut Venn Durability
Ulquiorra and Vasto Lord Ichigo were a 100% threat to Cien. We discussed this in previous pages. Even if you don't take Dangai Ichigo as Vasto Lord Ichigo like me, you can at least argue that Vasto Lord Ichigo would destroy Askin and Lille Barro. There's a statement that even Zaraki, who is slightly superior in SAFWY Eye Patch with 60% Cien, is so superior that he's unaffected by Starrk's wolves and Baraggan's respira. 100% Cien specifically targeted Las Noches to prevent the copying of Vasto Lord Ichigo and SE Ulquiorra's powers. When Rooka copied Mugetsu, he panicked, asking if she had copied something stronger than Ulquiorra and Ichigo.
Zommari and those weaker than him are also victims of Base Liltotto. And yes, I'm not scaling Byakuya to Yammy because he has a lot of anti-feat that contradict that idea. Once you've taken down Byakuya, there's no reason to pick overly powerful opponents like As Nodt.