my diagnosis had a lot to do with malnourishment from veganism so yes change of diet made a huge difference for me.
my vegan xp also biased me strongly against diets that omit things like red meat, eggs, and dairy, since I hadn't had any of those for over a decade and yet I still got sick.
my diet is different than most ms diets out there. today I ate two eggs with veggies for breakfast, a bowl of tomato potato bean soup with half a sausage sliced into it for lunch, and for dinner: a giant mixed salad dressed with balsamic vinegar, herbs, olive oil and flax oil, plus topped with cranberries, sunflower seeds, walnuts and a little feta cheese, WITH a homemade venison/pesto/kale/feta burger and sweet potato homefries sautéed with chopped onion.
it's all whole food, home-made, nothing to excess. life can be good on this kind of diet
I am way healthier now.
in 2006 I landed on my head in a bad snowboarding crash and I ended up in an mri machine having a full on episode and getting dx'd with ms.
in 2013, the other day actually, I landed on my head in a bad skiing crash and nothing happened at all, except I need knee surgery :S hehe
my approach: no meds so far - just nutrient-dense anti-inflammatory whole foods, and supplements where needed
info: www.whfoods.com, www.nutritiondata.com