I guess you're asking me to explain why Doflamingo is superior to Acnologia... okay
Before I get to that: What I meant by low end numbers is that, rather than the meteor that Doflamingo slashed being measured at a specific distance, the calculators guesstimated that it moved 1.5 meters by the time Doflamingo finished his attack. That's what got him the Mach 637+ low end speed. If they had used high end numbers (taking the meteor's speed into account... some suggest it moves at mach 1,948 when measuring the known atmosphere and guessing that the time in which the meteor traveled from the top of the atmosphere to Green bit was one minute (if it worked like a real meteor, it would have taken over 50 minutes, maybe over an hour to travel the distance, but it was being pulled in by Fujitora's power, so...) Doflamingo's high end speed would make him MHS+ if they measured the distance the meteor traveled between Doflamingo's swipes to be less than 1.2 meters or if the speed turned out to be as high as Mach 1,948--though that speed would be very unlikely. It is safe to say that Mach 637 is the lowest speed Doflamingo could be. He is likely much higher since he was easily able to evade 2nd gear strikes from post timeskip Luffy and was capable of keeping up with a 4th gear Luffy for a lengthy period of time (20 minutes+ in the manga).
Alright, so: Doflamingo one shot Smoker without him realizing it. Smoker is stated on this wiki to be faster than pre time-skip 2nd gear Luffy (pre timeskip Luffy in G2 was finalized as being Mach 441, so that supports Doflamingo casually having at least Mach 637 swiping speed). Doflamingo also blitzed Sanji, who is also faster than pre time-skip Luffy. The sad thing is that Sanji specializes in Observation haki and he still could not react to pentachromatic threads.
Unless Acnologia is much faster, there is going to be a problem.
Acnologia could obviously speed blitz God Serena, Gildartz and others of that caliber when his speed is calced to be somewhere in the middle of MHS and their speeds are H+/HH in terms of combat and reaction speeds. Also, August and Zeref are not Doflamingo.
Doflamingo has an ability that can easily limit the movements of Acnologia in Dragon form especially. His Bird Cage was capable of pushing Fujitora back (Why scale Doflamingo to Zoro when he can easily be scaled to Fujitora? the 10 MT KKG calc is also inaccurate so I don't see your point. The old one was hiding a single outlier while the new one was missing a timeframe and lacked PE). Doflamingo's threads were capable of holding down the likes of Sanji with little to no resistance and could hold down Diamond Jozu and Oars Jr--the latter losing his leg by the same threads.
Why don't you go see why Acnologia is listed as Mach 400 in combat speed? Doflamingo is clearly faster.
Doflamingo has passive regenerative capabilities. Who knows, he would have most likely stood back up minutes after taking KKG to the face if the marines didn't go and chain him up since only minutes passed since he connected to the ground. He survived a blast that destroyed multiple organs and muscle tissue and stood right back up and was still overpowering someone of Luffy's caliber--even connecting a kick that would have sent Luffy flying over several hundred meters at least given the angle he left the palace when Trebol caught him.
Doflamingo has a basic level of Observation haki, which boosts his combat reaction speed by a small degree, which allowed him to keep pace with G4 Luffy despite being lethargic.
Doflamingo has a proficient level of Armament haki, which boosts his durability and attack potency. He brushed off hawk strikes with minimal use of Armament haki, claiming that they felt like mosquito bites. His spider thread could stop Law's Tact and Luffy's 3rd gear strikes with out stressing. If Luffy's output was 10 megatons, that would be ridiculous considering that Doflamingo's spiderthread ALONE could stop Law and Luffy's previous attacks with little effort.
Doflamingo has conqueror's haki, and he is proficient enough with it to apply it to his physical strikes. The shock from his haki is strong enough to blast Law and Trebol away from the immediate area as well as make the entire palace along with the flower hill shake. Doflamingo's casual kick was capable of cutting through 3 palace towers with the force still going outwards, which applied at least a dozen MT of force given how high the towers were blasted upwards (the two outer towers being tilted over 60 degrees) and likely even higher since the force from the kick continued going horizontally off of the screen: http://www.***********.net/one-piece/745/5
Doflamingo has the ability to awaken his devil fruit, allowing him to convert objects into strings and he can apply his haki to them. I highly doubt that Acnologia can land his breath attack if Doflamingo suddently threw waves of threads over his body and applied his haki to them.
Acnologia's physical attacks are not that impressive and given how far his force went when clashing with Igneel over and over again, his physical power in Dragon form is not much higher than Doflamingo's own.
Doflamingo has the advantage no matter the environment (unless of course it is over an ocean with no clouds in the sky
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And no, you can not say that Acnologia wins and demand that it be put on the page when it is 9 to 4... lmao.