Just drive it and enjoy it.
The 6.7L has OAT based antifreeze. So use the proper test strips when you test your coolant every 15,000. It uses VC-12 as the additive when you need to add it. The coolant is good for 105,000 under normal use and 60,000 under severe duty. No need to change out ELC.
It's up to you about additives. A very small percentage of owners have had the High Pressure Fuel Pump (HPFP) fail. It's usually not covered under warranty and the cost is extremely high at $10,000 to $12,000 for replacement of the fuel system. Ford seems to think any failure is caused by water in the fuel, DEF int he fuel or bad fuel. The addtives can increase the lubricity of the diesel fuel you buy. Regardless, drain your water filter monthly and replace the filter as scheduled.