I think it would be nice to be able to annotate the slope in two directions. Let me explain: sometimes we have a constraint for the main direction of the passing (ex: 5%) and another for the transversal direction (ex: 2%). However, the current slope tool only gives the maximum slope allowing us to know if the main constraint is verified but not the second one.
It would be nice to be able to decide on the direction of the slope we want to annotate.