Right now the split feature reads the "Tool" as a plane (meaning there is no start or beginning of the "Tool"). This can cause issues if I am just wanting to split one portion of the solid body. There should be an option or way to say you want to treat the "Tool" as a plane (no start or end) or a line (defined start and end).
For example, if I have a pipe that I did a sweep to get the overall path. Then I draw a line where I want to split the pipe (at the miter location). Once I select that line as the "Tool" it actually reads it as a plane and splits everything that it would intersect.