I've heard there is some liberalization, but frankly there are many things you can do to avoid T2 diabetes in the first place.

A family history does not mean you're going to get it, it may mean you're more pre-disposed to it. You should spend your energy researching lifestyle and health issues for at-risk or pre-diabetic people. If you eat right, exercise, and don't drink to excess you'll probably be just fine. Body weight is the biggest factor...you want to be thinner than the average American of your height. There are guidelines published for that, your ideal healthy weight is lower than you (and most Americans) would think.

I would not plan on a long-term career as an insulin dependent pilot...any waiver policies for that could vanish overnight, all it would take would be a crash or even incapacitation event involving an insulin-dependent airline pilot to shift the political winds. Remember waivers are exactly that...the FAA does not require any due process to revoke such a policy.