This worries me. More aggresive playcalling, particularly with a QB like Henne, will translate into more turnovers.
What happens when (if) Henne throws a pick-6 to kill a game, or throws 5 INTs in a game? Do you go back to "safety"? Or do you push forward, accept that things like that are going to happen from time to time, and move on?
For reference, there's the Green Bay Packers and Brett Favre. Before his MVPs and Superbowl, there were these stats:
W/L Att Cmp Yds TD INT
8-5 302 471 3227 18 13
9-7 318 522 3303 19 24
9-7 363 582 3882 33 14
Obviously that 3rd season is very impressive, but on the way there there was the 1993 season, where Favre threw a bunch of INTs and his completion percentage decreased dramatically, from 64.1 in '92 to 60.9. That INT% is the 3rd highest in his career, below 2005 and his awful 2010 season.
The important thing is that Holmgren stuck to his guns, and eventually things got better. Favre bounced back from 3-INT (KC, CHI) and even 4-INT games (DET) to have good games (the tour-de-force he put on the Lions right after the W17 debacle was the most impressive), but it never would've happened if Holmgren panicked and sent him to the bench - or worse, changed his playcalling, effectively neutering his QB. I just hope Sparano has the same fortitude to hold firm.