The summoned Hashirama basically uses the same standard and chase as the actual ninja.
He sets up his barrier as soon as he's summoned.
I"m not too sure if his passive works as well, it's been a long time since I used Oro Traitor in pvp.
This Hashirama still deals quite a lot of damage, though.

Just because you don't know how to use him doesn't mean another person doesn't.
His skill can be op during lower to average levels.