That's one of the weird things about Ole's time.
In an interview he admitted he was hands off for that period, he let Mckenna and Carrick decide what to do when he came in, we played a 433 and played very well, flowing football, new manager bounce is the obvious call. Ole started taking control of formations and tactics later and we tanked like a stone. At the same time we did get injuries to Herrera and Pogba and Matic and it was transpiring Herrera was not staying, it was maybe right to explore other tactics but that poor run from March to the end of the season getting beat by Cardiff continued into the next season where we climbed out the bottom half, the formation really only made sense when Bruno made it work. He's been the unofficial captain since he joined. We were in state from March to Dec.
While I'm really questionable of the staff I do wonder how much Ole is spoiling it all.