One more update specifically for LTE usage.
I started out 100% full charge 6pm, drove 30 mins, played music on AirPods for 6hrs total of music from Watch, answered a couple text, couple security cam alerts, read NEWS...few breathes..drove home 30 mins. Total of 9 hours, battery was 15%. Slept in Airplane mode, Theatre Mode, DND (as always) w/AutoSleep and woke up 6 hrs later with battery at 7%.
Personally I find this very acceptable.
Approximately 9.5% battery drain per hour, solely on LTE while continually playing music over Bluetooth.
With iPhone present and normal usage I range from 1.5-2% an hour..average. Including 45 min workouts, sleeping everything so again, acceptable, IMO