:lol seriously djordje.that logic since you cannot compare them two scan since no one knows what movement speed kishi is using
Every character can use high speed with shunshin. But what is problem with that. Shunshin was never continuously spammed in entire manga . You need to focus big amount of chakra to perform extremely fast shunshin.Thats why you can´t spam it.Once you perform it your speed becomes normal.
Gates are different they are not shunshin. Gai can use amazing speed continuously ,only gates allows user this. All JJ Madara could do is defend with TSB ,he could´t even think about engaging Gai in battle. OP restricted any ninjutsu so they wont have a way to defend against 8 gates Gai.
Not to mention actual CQC skills that favors Gai.Gai stomps.