Hey mate, I've been smoking Champion Legendary Rich Red 25 gram for a while (used to smoke Ruby but changed after Rich red became the strongest colour of Champion) and I've noticed the exact same issues that you've had. I've sworn that since they changed the packaging, there hasn't been as much in there as there used to be. I used to get 4 days per 25 gram pouch, pretty consistently and now I can barely get 3 days, still using the same filters and rolling the same size smokes. I honestly thought I was the only person it was happening too. I hope they fix these issues because,as you stated, this premium tobacco costs a bloody arm and leg these days and I honestly get better quality and quantity from grass in the back yard!
