@Con-Hennekens I find this an excellent suggestion!!
However, It would most likely only work when you stay within the MRA context, MRA Web and MRA Nav.
If you bring an MRA route to a GPS device then that device (or the company behind it) will be unable (or unwilling) to take these MRA settings into account. Garmin and TomTom for instance use different maps that sometimes deviate. you can't force Garmin to use a TomTom map or vice versa.
After this negativity (right or wrong) it would still be very good to have the route settings integrated in the route on MRA. Currently, changing a setting in MRA web can lead to quite large changes in an already completely prepared route.