I'm sure they've tried everything they could possibly think of.

[She's staring at nothing really, thinking hard. She might be less willing to accept that the people here had tried their hardest if it wasnt for the fact that Minato was stuck here, and had been for so long. If anyone was powerful enough to remove himself from this place, it was him.]

I'm hoping that a fresh set of eyes might bring a new theory or plan to light.