Between April 1st and June 1st (I got the game early), I beat FF7R three times. Here's some useless info:
Playthrough #1: 44hr 27mins, Normal, English w/ subtitles, All sidequests
Playthrough #2: 45hr 57mins, Normal, Japanese, All sidequests & arena battles
Playthrough #3: 46hr 51mins, Hard, English w/o subtitles, All sidequests & NG+ arena battles
Total time: 137hrs 15mins, or 2hrs 15mins per day
Interesting (to me) that each subsequent playthrough actually got longer. English w/o subtitles is my favorite way to enjoy the story, after turning down the music and sound effects in the settings. Hard mode has the best combat, but since you're locked out of using items, the item economy (treasure and shops) is busted.
Now to get the remaining dresses in French on Classic mode!