I don’t see there being any issue of “drop off” owing to players thinking the manager won’t be there much longer. That said, I dont really like the idea of signing on for another year each season on a rolling basis. There’s no commitment.
even pellegrini was given/signed a 3 year deal when they knew he was going to only do a year.
No he wasn't. He was given a one year extension, in his final year.