It seems not so many people are interested in small venue? On the contrary, I prefer small venues this tour, the sound, the opening will be better there.
Edit: I was forced to choose stadium nearly at the last minute, but MSG will be awesome if possible.
Edit2: One of the advantages of IN-DOOR small venue is that, you don't need to worry about the sunlight at the beginning of the show.
Edit3: The light is one of the best parts of this tour, for IN-DOOR small venue, it will be beautiful from beginning to the end.
Edit4: For stadiums, the light up wristbands (especially HYGTG) will be more beautiful there, because of bigger audience.
Another advantage of IN-DOOR small venue, is the sound. The acoustic will sound better there for sure.
Edit: I think this also apply to ENCHANTED / WILDEST DREAMS (Edit2: I think we will find the best ENCHANTED / WILDEST DREAMS performance, in Staples Center)