Another stakeholder in the equation is WRC Promoter. I know that they've been pushing for shorter stages and ways to make the sport more directly followable
Problem is the manus already in the series (and doing well) usualy want as few changes as possible, both to keep their advantage and to avoid extra costs.
In the end rallying is marketing for the car manufacturers. They pay the big bills. It's only fair that the get to be in the deciding process.
Mikkelsen testing on same road as Hyundai with WRCs: