For sure you can take a ski that allegedly does not work for you that is two generations old now and tweak it to make it better for your particular skiing style, reducing its resell value a lot and spending several hours in the process.
Or you could trade it for a newer generation one (ION & ION 2), that have hundreds of hours of expert R&D and world-class testing on them, and see if it works better (which has been the case for all skiers I know that have upgraded their EVOs).
I guess it all depends on the pleasure derived from the tweaking process and placebo effect v/s the pleasure of more probable better skiing out of the box with the newer versions.