We always said we just needed him to be decent. He's been kind of inconsistent - the stats today will say he was great (4 TD, 0 INT) but we all saw a couple of balls that could have been picked. It was really a tale of two halves. In the first half, he couldn't seem to hit the broad side of a barn, though I'm not sure why. Even the TD to Sanders was underthrown, and Sanders had to turn all the way around to catch it. Then in the second half, he's throwing darts including the beautiful TD to Thomas. Been kind of like that all year, really. So to me, that adds up to ... decent, which is what we need anyway.
I think ultimately this offense will be better off with Lynch out there, though I'm really only basing that on potential and hope. For now, if he can avoid turnovers, Siemian seems good enough to me.