I don't have my Explorer yet but I have done quite a few remote tunes.  You would be surprised how much they can improve the tune after logging sessions.  On my other cars, fueling and timing and shifting were big changes.  I would never purchase a tune from somebody that DIDN'T do remote logging.  Every engine and trans is a little different.   Dyno tuning is the best IMO but good luck finding a local guy with a dyno and ecoboost experience.