Belt driven pumps are nothing new. With t-belts lasting a 10years/100k or more, I have no fear of a belt driven oil pump. Its not new technology but Ford's implementation is something to worry about(suppliers).
I prefer the 5.0 V8 over either ecoboost v6 for my type of driving/towing. And, if I really needed more power than a 5.0 F150, I'd just grab an F250/350 powerstroke. The egoboost isn't needed in this driveway. I do wish that Ford with give the 6.2/7.3 as much love as the 5.0.
Some engines don't tolerate loss of oil PSI. Others do. It all depends on engine design. Most will wreck an engine with a catastrophic failure. So, I wouldn't even worry about it. You have a warranty. And, when it expires, change the belt out every 100k/10years or whatever gives you peace of mind.
New pushrod gasser 7.3 Ford is begging for a driveway spot. Tired of diesel headaches and turbo gas issues. Been there and all done with it.