I'd really like to fix the vanishing dino issue even if we're going to wipe later. My suggestion is to set the food-consuption rate to 1 again, even if that sadly means the attempt to help less active players keep dinos for longer is undone. Since this would also boost taming speed I also would set taming effi from 6x to 3x so that the time required to tame stays the same.
At least we can check if this really is the issue and players will not loose any more dinos they'd might want to upload.
Any statements?