Sam Howell is a below average qb and has him putting up above average stats. Also the KC offense has taken a nose dive replacing him with Nagy as OC. He has championship experience and is a brilliant offensive mind and also has ties with Poles from their KC days. He would turn Fields into a Mahomes lite MVP candidate.
To be fair I think a big part of it was the Nagy effect. People look at KC with Andy Reid and question how good the OC actually is and how much are they a product of Ried coaching and Mahomes QBing. Nagy's tenure in Chicago made that even worse.
But to also be fair, I don't know anything regarding his character, so who knows.