EGR delete yes, head studs are not needed, after all it is the EGR that clogs which turns coolant to steam which stretches head bolts which blows the head gaskets.
Yes the 6.0 could have used more head bolts but with a proper working/flowing oil cooler and EGR delete there is no reason for head bolts to stretch, lots of high mileage 6.0's out there with stock head bolts.
I think the oil cooler plugging, Motorcraft gold coolant, plugged EGR's, and bad coolant caps were the true problem, we have had 17 years to learn, the 6.0 is a hard running engine, with proper knowledge and monitoring it can go the distance and be a great engine.
Even tuning has come a long way, good tuning with limited timing and boost while still adding a ton of power is now the norm and the engine handles it just fine.
On another note don't believe the internet rumors, the early 6.0's had the problems and the later ones had all the updates, the "updates" were not better, the EGR which is the most crucial thing was MUCH worse in the late '04+ trucks, the '03-'04 had big tubes and did NOT plug meaning they didnt blow head gaskets.