I would assume it's adjustable, most of the E-framed spyders have either set screws accessible from the outside, or a screw inside which you can adjust to move the trigger closer to or farther from the switch point. If you don't have visible set screws, take the frame off, and look at how the trigger is installed. You could also invest $10 in a lighter (50 or 25g) microswitch, if the stock one is too heavy. Not sure what you mean exactly by "nasty snappy", electro triggers more or less feel the same to me with the exception of how close to the switch it's set up, and the force needed to trip the switch.
Pictures would be helpful too.