It's been in the care package for around 3,6-ish months, so it'll take a while before it's been a year.
I think it's important to keep in mind that other guns also rotate into the Care Package, I don't think the Wingman should really be getting any special treatment.
Don't get me wrong, I bloody love the thing.
It's absolutely powerful in the right hands, though I think that's exactly why it's a good fit for the care package.
They've also been adjusting the Wingman (Recent Patch), which might also provide some useful data for future balancing.
Diversity is a good thing, it keeps the game fresh.
After all, having a game where you constantly die to the wingman because it's all that players use, isn't that much fun, now is it?
Of course it shouldn't stay in the care package forever, weapons rotate in and out for a reason, but I don't think this is that much of a bad thing.