Interesting: I own the same pen, but do not have the issues you listed. Mine is a Medium, but light inks remain light (i.e. the flow is not thick).
If you meant that you want the thickness of the ink to vary with angle, then yes - most modern fountain pens are designed that way. However, they do also make the "italic" type ones.
With ball points, I can vary the heaviness of lines by altering how hard I press the tip into the paper. Very light pressure yields very faint lines. A fountain pen is uniformly dark, which I suppose what most people want for writing.
If you meant that you want the thickness of the ink to vary with angle, then yes - most modern fountain pens are designed that way. However, they do also make the "italic" type ones.