True, JJ gave more to the D than the offense... but for that he deserves a LOT of credit. Not since the "no name" D did Miami much of any D at all. Shula fell into the habit of depending on Marino's arm to stage comebacks... then Dan got old too, and it wasn't happening as easily. Then in comes JJ... touted as the "savior" of the Phins... much as he had been with the Cowboys. Not much he could do about an aging QB who was possibly the greatest ever, and still "Mr popularity" with the fans, and in the clubhouse... personally, I think part of the reason he walked away, was that he knew Dan's contract was coming up, and he didn't want to be the coach that turned his back on Mr Prolific. Anyway, he did in fact THINK he was grooming a successor to Marino... Damon Huard. After he was forced to relieve Dan in N.E., everyone else thought so also... it wasn't until the next season when he couldn't get the offense to score in any of the pre-season games, that we all realized he wouldn't amount to much.
Also, don't be too hard on KAJ ... he at least had a 1000 yrd season in 1996.. the first since Delvin Williams did it in '78!
I don't think he "ruined" the offense, I think he just couldn't fix it... yes some poor decisions (Avery comes to mind first, some bad luck (remember Cecil Collins? I thought Cecil the Deisel would have been fantastic, if not for his problems with the law), and of course his ego (his and Dan's wouldn't fit into the locker room at the same time... but Dan had earned his for 17 yrs).
He set the stage for Wanny... thankfully Wanny is smart enough to learn from JJ's mistakes, capitalize on JJ's sucesses, and add his own "touch" to the team...
Shula was an outstanding coach... but the game passed him by..
JJ was a very good coach ... but he was expected to do too much in too little time
Wanny will be a great coach, now that he has some of the pieces in place.. he'll be getting better...
Just a few thoughts from the newbie...