I just ran a T16 on 2.7.4.83734 and hit a 2 floor (normal) rift, made it to the end of said rift and had to double back before the progress bar was barely over halfway filled.
It was so odd that in all these years of playing it stood out as feeling “off”.
Maybe the dev’s need to revisit mob types, exp, and amount of rift levels just to make sure to set a solid minimum baseline value across the board?