All of our company cars have been EcoBoost powered since 2012 and we've put a combined 600,000 miles on them without a single major problem (except for a transmission in a 2013 Escape with 140,000 miles). Our current oldest vehicle in the is a 2014 Fusion with a 2.0EB with 120,000 miles. Still going strong.
My wife & I test drove Explorers with a 3.5NA and 2.3EB back to back and went with the 2.3EB, it was a no brainer. I bet a tune would really wake it up.