I hope you're wrong, because g2/3 was giving Kaidou a beatdown, what was the purpose of that? But what I will say is atleast we know Kizaru forced Luffy out of Snakeman. So Oda didn't go completely braindead, he atleast showed us Luffy using his fastest most effective mode outside G5 before using his most taxing state.
The only issue was he rushed the shit out of it, like maybe he just wanted to drive home the point that G4 Snakeman won't get the job done but imagine you gave those panels to Murata. Oda's lazy ass has just been leaving those fights for the anime to cover.