They actually did use Hoffman while down 3-1 in the 9th in game 1 of this series. And then again in the 8th of game 4.
In the DS, he closed that last game for 4 outs, came in with bases loaded in the 8th and got out of it with a flyout. Gave up 1 run in the 9th, 2 doubles by Aaron Judge and Jasson D.
I wouldn’t say he’s looked “great”, but he kept the ball in the yard.