@Usils Thanks for your reply and before I blow your mind and destroy your penis, +1.
The tier list is pretty accurate and your reasoning for putting them where you did is sound (utility being highly valued). However, you forgot the fact that the Widow is better in nearly every way than the Sin. The only thing the Sin has over the Widow is a better armor tank, however that is overshadowed by the fact that the Widow has far more fitting room, more mids and a unique role in a Blops Gang. The Widow can quite literally do everything the Sin can do, but it can also jam which at the very least, can save hunters.