Hashi's Y is quite useless. Come on, you don't use Hashi for this.
Nowaday, everyone have remove shield and buff on their setup. He do knockdown ? wow, incredible. Come on, you can't use him p1 since he do 0 damage.
His instant barrier is WAY WAY better.

And please, do not compare MM's mystery with Hashi's Y wtf

As Jinga say, MM c*e it round one, for ZERO chakra, and MM have dodge so """"he can't be"""" interrupted easily.

As he said, Edo itachi is the ninja who is the closest to MM, but still, itachi cost 20 and have no dodge.

@Renji: yes edo itachi dodge chase, but dodge is way better and prevent to be interrupted

@Scarlet: Shisui do same thing, even better. He do not have the godlike hashi's chase, but still, his mystery "is same". (remove buff, chaos 2 rounds (instead of immobile 1 round), proc chase, and hit more target; but 3rounds cd)

Edit: Well, i think mystery Y is good when you don't use konoha ninjas p1. You still have perma ninjutsu buff at start and increase mystery cd when chase. But Hashi is definitly not a good position 1 ninja.