I think we don't hear big statements or rumours from any teams this year. Even Horner reminds everyone that RBR is nearer to the limit and so can't make as big gains as others. It's the third year of this concepts, I think everyone knows pretty exactly what to do and cars will look similiar in 2024.
As the team suggested, a strong baseline which works everywhere is the big goal.
As a Mercedes customer (engine, gear box and rear suspension) it will be a good thing that they will also go the RBR way now. Hopefully also with the suspension.