He is better rehabbing his Winston/Favre tendencies as a backup for a couple of years at successful franchises. His path to starting(and likely failing again) in Carolina would be far too short with us.
TO prone gunslingers have not been in demand in the NFL for quite some time. It's not the talent that is the issue, it's the crippling TO's. If you want a QB like that, why not take the far more successful, talented and experienced Jameis Winston?
For all the lionizing of Sam Darnold here, same basic thing, TO prone(his TO's/game are actually UP on the season).
That's an outlier that has "worked" so far but ultimately you don't normally see TO prone QB's have long term success in the modern NFL. The margins are too small.
For context, BTW:
TO's Per Game Career
Darnold: 1.30
Winston: 1.14
Howell: 1.28