It's not even just Omoi, and it's not like Sarada didn't get stronger since then anyway.
Kawaki Arc Sarada >>> Cyber Ao
Why so many ">" lol?
Omoi ~ Danzo Arc Naruto ~ Part 2/1 Kakashi with Sharingan > Part 2/1 Kakashi with no Sharingan
Kakashi fought several V2 Jins, why would he be compared to Danzo who died to virtually every attack by an exhausted Sasuke? Or even Omoi, who loses in accomplishments and potential even to Sai?
Raikiri's Kakashi ~ Haku > Part 1/2 Kakashi with Sharingan ~ Zabuza ~ Might Guy ~ Kabuto ~ Sannin (Base Jiraiya and Tsunade) > Kakuzu > Part 1/2 Kakashi with no Sharingan >>> Sai > Omoi and Danzo.
Even though there is a speed advantage for Sarada as you try to assume, it's insufficient to blitz Kakashi.
Again, Speed wise, Sarada with Chidori wouldn't give Kakashi enough time to use Raikiri properly, especially if it's Part 1 Kakashi who may I remind you doesn't even usually start with the Sharingan.
Chidori really isn't a thing, Kakashi's fighting style is mainly based on Bunshins.
In the case, Kakashi could start by using
Raiton: Kage Bunshin no Jutsu as identification and using Doton: Moguragakure no Jutsu afterwards. Sarada would set off with everything using Chidori, hitting Kakashi's clone which will be undone and electrocute Sarada, while all the knowledge will be passed on to Kakashi in hiding.
Then, upon knowing Sarada's strength and jutsus, Kakashi could finish her by surprise by emerging underground, either with
Raikiri,
Doton: Shinjū Zanshu no Jutsu or even
Raiden with another combination of Bunshins.
I never thought that one day I would see Kakashi's skill being underestimated. Just reinforcing, Kakashi was once an ANBU ninja, so it's not OoC for him to go for the kill at first and he's an expert in assassination techniques far more than Sarada.