Perhaps but the grass on this new surface is such that the horses hooves are not penetrating the surface. Liken it to racing on glass - having a camber just changes the vector of the slipping as the hooves still won't be penetrative the surface.
I listened to Wilcox explaining how after they did the first round of remedial work the horses hooves were going in 10mm! The picture I posted doesn't show that.
The only reason they don't slip on the inside is because the surface has become rough. The wider you go on the bend the less rough it is hence more slipping.
I'm not familiar with Strath Ayr surfaces but when a horse negotiates a bend that isn't cambered its inertia pushes it outwards and if that inertial force is great enough it doesn't take much to make it loose its footing.
On a cambered bend the opposite occurs and although a portion of a horses inertia still pushes it outwards, the camber pushes it into the track which in turn provides grip/traction.
Jockeys will also try harder and take more risks on a cambered surface.