This is my attempt at being a realist. Obviously it won't be appreciated:
* Henne is a coach killer
* Our stadium lends itself to home flops like this. I doubt we'll ever win anything of consequence in that venue.
The OP has an avatar of Henne. The long delivery is in full view. The more I look at Henne the more it reminds me of Butch Davis' situation with Tim Couch about 7 or 8 years ago. Couch had awful mechanics and was poor when a play broke down. But since he had a good college resume and some sparks in the NFL, many evaluators thought Couch was a wise investment and would eventually pan out. I was not one of them. I wouldn't have taken Couch in any round.
With Henne it's the opposite. I loved him at Michigan. I was wrong. In an increasingly pass happy league you can't afford to settle for glaring deficiencies like Henne displays. He buckles in the pocket, and the crank up delivery lends itself to erratic throws and forfeiture of vital tenths of a second during the translation from decision to release.
He'd be a great backup type. But if we pretend he's the answer and don't seriously look for an alternative, and I mean immediately, I think Sparano -- like Butch Davis -- is betting his career on a QB who is destined not to pan out.
Wasting the final time out was another black mark for Henne, although I haven't seen it emphasized here. The math totally changes if we had that time out, allowing more than a minute instead of 20 seconds, if we could have stopped Houston on the final drive. You have to grasp the value of that time out, particularly when the clock is already stopped.
If a guy has question marks physically, the mental side needs to be ultra sharp and IMO Henne hasn't shown that.