Optimization and improvement of the shrink algorithm in Vertex Mode

Problem 1: The results differ between using the built-in Shrink in the INSET FACE (I) function and manually shrinking in Vertex Mode (Alt+S) after extruding. The vertex positions from manual shrinking are clearly messed up; please optimize the algorithm! Also, in Vertex Mode, Shrink (Alt+S) requires clicking "Even" every single time, even if it was selected previously, which is very annoying! Problem 2: Can you change the Shrink (Alt+S) in Vertex Mode so it doesn't push faces inward? Since Shrink (Alt+S) in Face Mode already does this, pushing faces inward in Vertex Mode means I have to switch back to Face Mode to push them out again! It takes repeated operations to get the original result.