"Speedblitzing Oven isn't a big deal"
It's not that it was Oven that makes it a big deal, it's that in the time between Oven's fist hitting Chiffon's face, Sanji travelled a short distance + kicked Oven + grabbed Chiffon + got away. That's not even 1 second, that's less than a second, arguably less than a fraction of a second considering nobody including Pound who was in front of them saw him. It's actually ridiculous to think about how fast that really is.
"Zoro speedblitzed Kaido"
I'm dubious about that being a speedblitz, it seemed more of a case of Zolo simply breaking a clash and counter-attacking.
"Skywalk doesn't increase your agility"
I disagree if your able to move in the air that creates another dimension in which you can dodge and move around in, having flight most definitely increases agility.
"End of the day objectively Zoro wins"
At this point yes he has some stats above Sanji but Sanji with Raid Suit is still faster, more agile and more durable with better CoO.