I don't think signing Fitzpatrick was a mistake. If he's thinking Fitzpatrick will be our starter & he's planning on trying to win with Fitzpatrick, that's the mistake.
If we're going to say, "if you can limit his mistakes, we can win games." Well, imo your chances of winning are better with Case & that same statement.
The only benefit I think Fitzpatrick brings is that he won't hurt you for 200+ yards on those mistakes he will make & that's a big one, in all honesty. That's the primary thing I have against going into the season with Case Keenum as my starter, but if the only other option is Fitzpatrick, then... it's something I'm willing to live with.
I don't think Keenum is the future of the Texans. I don't think Savage was drafted to be. But there's more of a chance that you'll stumble on something special with either of those two than with Fitzgerald. He is who he is right now. & yeah, I joked about Steve Young in another thread, but that's all that was, a joke.