Regarding Phil's weight, when the camera is on and pointed at him, he KNOWS what he looks like in that angle. The camera is that way to make him look as good as possible. I'm sure you guys know this, but I wanted to emphasize that his actual appearance is obscured by all these narc tricks he does with his camerawork. His most recent profile shots of fatly putting together the PC paint a clearer image.
When I was really heavy and lost a lot of the weight (240 to 140), I never really exercised so I still had a lot of fat, this changed when I started lifting weights etc. He hasn't done any amount of exercise in his life, and you can see it predominantly in his arms and man tits. So even at the lowest weight estimates (190+) he's still mostly fat and looks it. My theory is that Kat is really eating some of his portions at the snort fort, given his impulsivity when it comes to anything, he probably gives most of his food to her while he does nothing but sit around all day and drink. I can see him trying to pinch pennies to allocate more money to his addictions and eating less to get more pulls and alcohol is not a flight of fancy. We know that most of the money from the daily tips is already gone, the second it comes in he knows he's going to spend it on useless shit. So, it's perfectly reasonable to assume that he just eats less, but because of his sedentary lifestyle, he doesn't burn any of the fat off being a hermit. Most people should strive for a half an hour a day of basic cardio, he is NOT taking walks inside or out of his house, and I seriously doubt he can do an actual push-up.
I have also seen him brag about being skinny and him saying that he's the "skinniest he's ever been in his life", which I see as him thinking that Kat eating the brunt of the food, thus prevent the pig from getting into the manger and becoming fatter, due to his habitual impulsivities (He was really heavy in the past because of this lack of moderation and a fat wife to eat his food). So, I'm thinking he believes he has made a genuine change in his diet / lifestyle, when it's just Kat eating his share, other than that, he has done nothing else to lose weight.
It should also be noted that he is still an extremely unhealthy man despite him being at a relatively healthier weight as compared to his past self. He lives an extremely sedentary life, eats exclusively fast food and whatever can be door dashed, drinks heavily etc. He is a gluttonous man given he got gout in his LATE TWENTIES (very rare unless the subject is drinking and eating red meat excessively). He is a rubber man that is mostly fat, despite bragging about being 195, most of his organs have been nuked by all the drinking and his heart is probably all sad and shriveled up because of the lack of exercise. These are the factors that are going to lead him to an early death, and he looks 15 years older than he lets on. I seriously believe that he dyes his hair, just look at the rest of his face. All of the (NPD induced stress?), and destructive drinking and eating has added up, he looks like a sith lord. When he reaches his late forties early fifties it's going to be a rude awakening when all of these health issues become more and more apparent.