That's why we call him the Captain!
You should also factor in the reduction in regens you get from GDE. This could have a long term positive effect on the truck.
I am only hypothesising, but during a regen, the truck throws more fuel, and obviously some of it doesn't get burned. Where does it go? Some into the dpf to create those 1300F temps, perhaps some unburned fuel may coat the cylinder walls, and end up in the oil creating possible fuel dilution. With stock tune, and some other tunes, they are known to regen just as frequently as stock. So IMO, there's the potential to get more fuel dilution if you have so many regen's during the life of an oil change.
I worked out the math, with stock tune, my truck was going into regen every 120-200 km, and I changed my oil every 10,000 km, so between that time, my truck would have had on the worst case, between 50-83 regens between oil changes. That's a hell of a lot of opportunity for a little unburned fuel to make it's way into the oil... I could be wrong, but look at all the bearing failures on these trucks. Is there the potential for fuel dilution? Maybe.
With GDE, I get a regen every 1100-1200 km, so with the life of my oil (again, 10,000 km), my truck would see maybe 9-10 regens per oil change. That's a huge improvement and the potential for fuel dilution decreases...
Not to mention, DPF's have a life span, so the more we plug them up, heat them up, regen, the less they'll last. They ain't cheap to replace, so less regen's is a good thing for the truck IMO.