Some things will become clear but it'll be like cutting heads off the Hydra. But that's the fun part of science - every question answered seems to raise many more.
Looks like you don't want to be there when it 'rains'. But it's amazing how far the impact of the big crater reaches. I wonder if these are cracks in the surface or sprays of dust.
Mercury has some exhilarating mysteries, and I look forward to seeing the probe unlock them.