If you mean they have one chance to win next season - if Aaron Rodgers stays healthy, yeah, that's exactly what I meant - of course.
If you mean one chance next season and then never again - implying Rodgers is fading fast or whatever, then hell no, that ain't what I meant at all. They could win half a dozen or more Super Bowls if Rodgers stays healthy and effective.
Yeah, I agree with your assessment of the roster in general - full of Ted Thompson mediocrity. Hopefully that will gradually change for the better, but even if it doesn't, Rodgers is just that good that he could carry an otherwise mediocre team all the way. He did it once and has come fairly close several other times.