It would be helpful to be able to define/use Soft Selection from selected vertices and the "flood" the weights just like the VertexPaint tool (bucket). Similar parameters like edge distance and "shape" of the curve.
So while having some vertices selected and the Weight Tool active, some button can be pressed to enable Soft Selection. Could just use the one from VertexPaint I guess.
VertexPaint has this feature where you can "flood" or "paint bucket" the soft selected vertices resulting in a smooth application of color (here weighting). I would expect similar behavior when pressing one of the weighting buttons in the Weight Tool.
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