Small bad news: Tamron raised the price of the 28-75mm FE lens. You now get it for $879 (instead of the previous $799) at, Bhphoto, FocusCamera and Adorama.
The lens is still hard to find in Stock. I hope Tamron will increase the production of the current lens and for the future rumored new 70-200mm f/2.8 FE lens.