There's little point picking Smithy if Farrell's at 12, the last 6-7 years have shown that if OF is picked (either at 12 or 10) then the play (and the team in general) has to revolve around him. If Smith is there to play the Ford role (to give the ball to OF) then there's little point playing him. If Smith is there to play his Quins game then why play the robotic Farrell next to him? He's just a handbrake on any creativity. Play Tuilagi in the Esterhuizen role with Marchant or Slade at 13.
Not sure I agree. When England were at their most effective in 2018/2019, Ford was calling the phases and was taking the ball when the attack was on but using Farrell as first receiver when it needed to be cleared or there needed to be another phase of forward play. The wheels came off a bit in 2020 and 21 but a big part of that was how little quality gametime the Sarries players had had.
Eddie doesn't do much by chance. The clear out after the SA tour resulted in some very deliberate changes in the style of play, particularly around the back row and back three and it's very unlikely he hadn't planned that. I think the same is happening here - you don't bring in a player like Smith and then not make the most of what he can do, especially when Ford is in form as well.
For me, a lot may come from the time Smith and Farrell spent together on the Lions tour - reportedly they spent a lot of their downtime just talking rugby. If they've begun to build an understanding I think it will translate to the pitch. Marcus certainly isn't afraid to tell much more senior players what to do in the Quins squad, and the way he ran the show in his one Lions game suggests he's not afraid to do it with players he doesn't know so well.