I agree. Drafting a QB is typically the way you buy yourself more time to get it.
Dave Hyde and I were discussing this a few weeks back. It doesn't matter where you draft a guy. You live and die as a Head Coach acccording to your decisions at the QB position. There's no, "Well, he performed well for a 2nd rounder..."
Whether it's 2nd round, 6th round, trade, free agent, doesn't matter. Your wagons are hitched to your quarterback. I do not want the team to hitch their wagons to Chad Henne anymore. I don't believe the players in the locker room have any faith in him. I don't think the coaches really have any faith in him. The fans certainly don't. If he comes out and just starts playing lights out, that would be one thing. That faith will quickly start to be restored. But the chances of that are...? So what you're faced with is more along the lines of seeing 95% of the same old Chad, with potentially fewer interceptions because they favor shotgun passing more as opposed to play-action. But, unless fans and players are slapped in the face with something new, something they haven't seen from him before, they're going to keep thinking it's the same Chad. Any amount of team adversity will be felt that much more strongly, like holding a freshly burned finger near something hot.
If they think Colin Kaepernick threatens defenses right away that's fine. I don't. I do think Cam Newton threatens defenses right away, enough to play him immediately. And he's strong as an ox. The more the fans see the new QB, the more they're likely to give the coaches a pass for losing.