Davies has said that Laidlaw is basically coming as first-choice 10, who can also play 9. My guess is that we'll go with Robson/Laidlaw and Aled Thomas at 21.
Laidlaw-as-a-10 has split Shedweb massively. I don't think it's ideal personally, but then I think Gloucester can work around it since the signings have been good elsewhere. Saints manage without a top 4 fly-half for a start.
I'm not worried about not having a top 4 fly-half as such, it's more the lack of an 80+% goal kicker that worries me. In the past, Laidlaw would have been great for this. Not so much recently.