This lens is one of my favorites for shooting people in both formal and informal images. I used a wonderful 28-70mm f/2.8 Tokina ATX lens on both my Canon full-frame and crop sensor cameras and loved it.
The Tamron 28-75mm equals the quality of the Tokina which was superb.
Th 28mm wide side is no problem for me. In fact it is a plus in shooting people since it tends to avoid the distortion inherent in a wider lens.
Along those lines, I absolutely love the Tamron on my A6400 crop sensor body for shooting people. The 42mm equivalent on the wide side is great as is the 112.5mm long end...