So, I've had my EGR bypassed for a few years now, against many recommendations.

Since I have just had a new PCM burn and had the EGR code erased, I have now unplugged it altogether.
The car seems to run better. Maybe it'* just my imagination but I do feel an improvement.

I should have done more experimentation at the track last week but not enough time.

You live in a generally cooler climate, so you can probably get away with the hotter combustion temps, particularly with your water injection.

Honestly Paul, in hindsight I should have left mine disconnected as well. All the problems that I thought were due to the EGR delete ended up being unrelated. I'm sure the car would've run fine without it, especially after my custom tune.

This is not a mass endorsement for EGR deletes... just a friendly reminder that it can be done without adverse effects in some applications. Saves you from UIM failure with the L36 as well.