Issue: I suggest that there is a need to improve user productivity using sketch fillets.
Problem: When needed to make tangent arcs to lines, the user normally draws the lines first, and then applies fillets between the line pairs to obtain the tangent arcs. When the user only needs 1 or 2 fillets, this workflow does not need too much time. But when the user needs to draw several fillets, and specially when the fillets have all the same radius, this workflow is not the best one, from the user productivity point of view, since after selecting all the line pairs, and the fillet is constructed, the user will have to re-specify constraitns, to guarantee that those fillets have all the same radius.
Solution: To improve sketched fillets drawing workflow, I suggest that should be introduced a new fillet command, where the user pre-specifiies the radius value, and after only is asked to select vertices between connected lines, instead of selecting two line pairs. This improves speed, by selecting falf the inputs, and by do not needing to re-constraint the fillet arcs to have all the same radius as needed. I guess this is the Solidworkds workflow, and it is indeed a time saver for the user, since this is such a common sketch drawing task.
Curiosity: Creo constraitns vertices for sketch mirror operations (instead of constraining the line entities instead of their vertices), contrary to Solidworks, but uses line entities for the fillet operation, when the vertices approach is the faster alternative for the user, when Solidworks uses vertices, as the better approach. Creo's approach for the fillet operation is only better when the lines to be filleted are not already connected by a vertex, so, it could keep both methods as different commands, or modify the existing command to allow both aproaches, filletingbetween non parallel lines, or filleting the line connected vertices.