Hindsight is a wonderful thing.
But I do believe the win against Liverpool convinced the Board to stay with Marsch and tbh I would have thought the same then.
Gracia whilst it appeared was tactically sound he let himself down by a) sticking with Meslier for the Fulham game and onwards and b) refusing to pick Gnonto choosing to stick with Aaronssen oh and playing Harrison who cannot tackle as a LB.
Anyone with half a soccer brain could see those decisions were wrong and contributed to his downfall.
What gets me is the so called senior players like Bamford, Ayling, Cooper and Harrison moaning to the Board about Gracia yet those very same senior players have performed like Championship players at best all season.