Didn't really feel much different - that's the thing with autoimmune diseases, you feel crappy whatever your weight if it's flaring. I think it's much the same with any MH condition, if you're feeling crappy psychologically, it doesn't matter what size you are, even if you think that everything will be fixed if you wake up tomorrow morning looking completely different. I know being in a shitty relationship contributed/caused the overeating with enforced lack of activity, as I was swallowing down the fear, the wish to escape, the wish to scream and shout and fight. And there was a huge element of wanting to be too heavy to be picked up and thrown against things.
It was more difficult to find clothes that fitted right, as not every person has the extra in exactly the same place; I was never very large chested, so things that would fit elsewhere would drown me at the front, and there was always a huge gap at the back of my waistband if trousers fitted my upper thighs and front. Although, since Regular and Short have been redefined as having legs about 6 inches taller than previously, no trousers fit me now.
When I wasn't in a flare, I felt fine - I was still strong, still active, could still run, swim and play in a band at the weekend. And I could do 200 situps, leg raises, crunches and whatnots, even if my tummy got in the way of getting flat to the floor in yoga.
Bloods were fine, blood pressure was fine, heart rate normal, no signs of osteoarthritis, bone density perfect despite prolonged steroid use for years.
Being in remission, though - that feels good. It means I can exercise more, which means I'm more relaxed, the muscle development is visible rather than cunningly concealed and my RHR has dropped from about 63 to 54. Haven't had my blood pressure done recently, but I'd imagine that's gone from its usual 115/65 to a bit lower.
The most irritating thing was being told by randoms that my autoimmune disease would magically resolve if I lost weight. No, it's autoimmune. It doesn't work like that. Never really sunk in with them that I wasn't limping because of excess weight, I was limping because my immune system was identifying the tissues around my ankle as alien substances, as it had been doing intermittently since I was a 3 stone kid in infant school. And even if I had been 30, 40 of 50 stone, that wouldn't have had the slightest bearing upon the inflammation in my elbow or fingers because they aren't weightbearing joints.
In short though, no, eating loads of things will not make you feel better. Because the desire is a symptom of wanting to feel better emotionally, not just to eat. Work on the emotions, the mood, the feelings, rather than trying to squash them down with food, or you'll still feel crap, just with some additional inconvenience and potentially some health issues.