As far as I know, 737 would have flaps extended at flaps 5 configuration and it is a common setting for takeoffs, and both slats and flaps would extend. But in RFS, if I have flaps 5 on 737-800, there’s only slats extended and have no aerodynamics effects.
I’m sure it is possible to make adjustments without major template updates as now we are having a quite detailed model.
Thanks for reading and please consider!