Its true that many people get too hung up on exact ratios and amounts, and although rough guidelines are useful for new owners there's no one-size-fits all approach to feeding that suits everyone and everypig.
I feel that we feed a bit more hay and a bit less veg than some people because it suits bloaty Puggle better, she hasnt bloated in over a year now and has gained 200g since her last bloaty episode since we feed more hay and a bit less veg, but that is just for a herd where the slimmest piggy is a bloaty girl and not for everyone!
Just as a matter of interest last night after a post on another thread querying food intake I roughly calculated what mine eat over a month- looks like we feed 75% hay, 22% veg and 3% pellets.
Not that I've ever weighed or measured daily feeds and I dont intend to start doing now, but dividing what we buy in a month by the number of piggies and number of days thats roughly what they must eat! Which isnt 80% hay and isnt 50g of veg per day either, but they are still all quite hefty and in good health