I never heard one comment about Griese being a smart QB who worked hard and picked coaching up fast. It was always more that he had a NFL QB father and that he threw a pretty spiral. 

I think people are way too hard on Siemian. He has only had one year of starting experience. Let's see how he does this year. If he doesn't show improvement and has the same issues again this year, then I think it will be time to see how Paxton does. 

It could work out that neither QB is the answer or that both could be starters in this league. We won't know the answer to that for at least another year, maybe two.