Why am I debating with someone who clearly can't read? We're talking about Base Tsunade, Byakugou is restricted in this fight, and Tsunade is using Byakugou in the Manga scan you provided, making it void for this fight. Base Tsunade's speed and reaction timing isn't on par with VotE Sasuke, he exceeds her in that category.
The point of the scan was that she reacted to Madara's Katon, She could of dodged it if she wanted but because of byakugou she decided to tank it, but since she doesn't have it in this case she will simply dodge it.
If she can React to madara's Katon, she can react to sasuke's. Simple
Also since byakugou is only stated to be an instant healing Jutsu and nothing said about increasing Speed/Reaction speed this scan is completely relevant. Byakugou tsunade = Base tsunade in terms of speed/Reaction speed.
Tsunade was clearly not rendered immobile and useless, she wasn't missing any vital organs. Chidori has shown to leave a massive hole in one's body after being pierced, and after Creation Rebirth is gone, she's not recovering an organ as vital as her heart.
If the bold is sarcasm, She was laying there due to her phobia of blood, Hence the moment Oro noticed her tembling stopped she attacked.
I'll ask you to refer back to my past post of naruto reacting to sasuke's chidori at the last moment
Taking these two things away pretty much puts Tsunade on par with Sakura when she fought Sasori, except Tsunade would have more battle experience, which means nothing when dealing with an Uchiha prodigy, 13 years old, or not.
Yeah she is like the sakura that fought sasori, With Far better Ninjutsu, Taijutsu, Far more strength and destructive force, Faster, Smarter, More battle experienced.
If you really think tsunade is on chunin level with these restrictions then.. Well words can't explain how dumb that sounds.