Bill,
What you have done can only help your vehicle.
Disabling EGR does reduce turbo lag between ~1200-2400 rpm and, thus, improves power in that range. Additionally, by eliminating the cycle of passing exhaust gases back through the intake, you will keep the intake MUCH cleaner. The line that runs from the banjo bolt to the switchover (aniroid) valve, then down to the ALDA, will not get plugged up as easily or as quickly with gunk.