The Cardinals are averaging 12.8 points per game with those 2 as their qb. Lets not pretend Arians is working miracles.
Posted this elsewhere but since you keep going back to this well...
Reid with a better qb: averaging 1.1 more ypg and 1.4 more ppg
Arians with a better qb for half the year: averaging .3 less ypg and .9 less ppg
It is funny you chose those 2 as well since it goes KC, Buffalo, Arizona at 21,22,23 in ypg in the league.
Kelly is an absolute magician but coaches like him do not grow on trees.
Norv as oc with Bridgewater btw?: 9 less ypg and 1.8 less ppg.
3 of the 4 coaches you listed as "improvements" are on par or worse production wise than Hackett....
Arizona is proving that you can win with amazing defense to the tune of 3-2. Unless you want to claim their 12.8 ppg is why they are winning. They were 9-1 with Carson Palmer and 3-2 since. Surely you see a correlation there?