I'd rather have a master bath with a tub, shower, double vanities, separate toilet room [preferably with a window]. Tubs come in all sizes and some new builds don't have them yet have showers large enough for a family of 5.
Why no tub when there is clearly enough square footage? Tubs can be heavy and even heavier when loaded with water. When we redid our master bath the contractor was most comfortable going with a replacement that duplicated the original build - weight and dimensions. No floor joist and beam issues.
https://homeguides.sfgate.com/dyson-v8-worth-cost-13772127.html