The crosshair is nice for aiming, but I find the original + console character is a poor method.
Some Quake ports implement a TGA/PNG crosshair graphic that can be replaced by the user (if desired). I personally like one bright green graphic that I created.
Presumably the graphical crosshair would be an option. (Someone may prefer the +.) Scaling would also be needed (as most user crosshairs would look best at original size, but some might need to be expanded or shrunk).