Zoro did obliterate Pica with a strong Santoryu move, then Zorowankers such as above dismiss that, saying Zoro used no-name slashes like what? That was a new, and at the time one of the strongest Santoryu move from Zoro and it was not impressive, that’s all I’m saying. From that I can gather that Zoro did not have access to moves as strong as g4 to try and beat Doffy. It took g4 level of raw power, and Doffy outlasted a round, not to mention a GK from Law
Doffy had incredible feats and portrayal that people just forgot through the test of time. Zoro held his own against Fuji? What about the time Doffy broke out of Kuzan’s ice in seconds, and even had the balls to try and kill Smoker in his face.
Zoro did jump several tiers from DR, the enma boost was significant. His haki was never that potent, and enma forcefully let it out. Not to mention the offscreen powerups from MCs, even Sanji was able to hurt Queen (an opponent way stronger than Vergo) pre-exo
I think your general points have merit.
But it was pretty much highlighted throughout the Pica fight that Pica simply was not on Zoro's level at all, and really none of his opponents until Wano were. Considering the sheer size of Pica's Golem, I am confident that Zoro had access to moves that would significantly hurt Doffy. I mean, lethality/AP is pretty much his specialty. Now I am not saying he would have 100% beat him, I think it is fair to believe that Zoro had access to moves that would put Doflamingo in danger for sure.
My point about Zoro holding his own against Fuji wasn't supposed to be proof that he could defeat Doflamingo, but rather to show that Zoro's upper limits are very ambiguous.
I disagree about Zoro jumping several tiers to an extent. I agree about the offscreen power-creep, but I don't think Enma's power-boost was significant enough to have Zoro jump several tiers, especially because he still had very little mastery over Enma even by the time of the King fight
Ultimately, my point is more that Zoro's level pre-rooftop was entirely unclear. I believe that saying Zoro "would get as neg diffed as Sanji" or something along those lines is just as presumptuous as saying that Zoro would have defeated Doflamingo. We were more or less shown what Sanji's limits were, while Zoro's limits were basically left in the dark.
I feel like Zoro's portrayal of being very far above his opponents and being given various highlights outside of just his 1v1's is not something that I would just toss aside.