There's no reason to panic and start making rash decisions. The last 2 weeks, we've experienced some growing pains. We're 4-2 and we could easily be 3-3 (remember we beat Carolina on a missed FG). Our offense needs to evolve a little. Now that there's some film on our offense with Siemian at the helm and even some with Lynch, we need to adjust and get a little more creative. Hopefully Kubiak will come back soon and can "right the ship" so to speak. We don't need to trade Siemian or start Lynch right now.
Unfortunately, this offense isn't exactly creative and it's somewhat predictable. It's based more on execution than on skill. Right now, the offensive line isn't executing as well as they should be. That should be our focus more than anything else. The right side of our line is a mess. Even with Stephenson in at RT, both the run blocking and pass blocking haven't been up to snuff. This is the #1 issue that needs fixing. You can't expect Siemian or Lynch, both of whom are relatively new and inexperienced, to perform well without a running game or even average pass protection. The play calls are sometimes frustrating, but it's hard to throw downfield without a running game, and the resulting play action, and pass blocking that gives less than 2 seconds to throw on an average down.