The merger and facilities move was in 2015. The complaints I have heard about FVF seem to have started with 2018 released tins/boxes. Those did seem to be lighter in appearance than just a year before. I smoke very little SG or Gawith fresh, but I did try some of the 2018 release when I first read reports of people finding such a striking difference in appearance. I had, and still do, a half gallon jar crammed full of FVF from 2017. The 2018 did taste a bit lighter, but it still tasted like FVF to me. No really dramatic difference to the extent others have noticed, so I put it down to crop variations, not the change in structure of the companies.
Sorting the reviews at TR by newest first yields virtually unanimous 4 star ratings across the board from 2019. Some reviewers are new to the blend, but some aren’t.