Could there be an option while extruding to turn on symmetry? So you have a solid or surface generated from both sides of the sketch in equal amounts. It’s helpful when the sketch sits at a centerline. Beats having to counter transform later.
While we’re at it, “extrude to surface” (eg: on shape) is super helpful, even more so when going parametric. Allows an extrusion to extend and end at a reference surface.