I'm struggling to see what the current dispute is about after my enforced spell in the slammer.  Karbinski argues for "Philosophy is the science that studies the fundamental aspects of the nature of existence in order to provide man with a comprehensive view of life. Major branches of Philosophy include Metaphysics, Epistemology, Ethics, Politics, and Aesthetics. The word philosophy is of Ancient Greek origin: φιλοσοφία (philosophía), meaning "love of knowledge", "love of wisdom""

I prefer a return to the main four branches.  Deleting the 'reasoned argument' part is not supported by the sources, of which there are plenty.  Philosophy would be a science in the original meaning of 'science' (scientia) but the modern meaning, while not entirely different, has connotations that it would be best to avoid.  On whether the philosophy of language belongs in the main branches, that is debateable.  My view, given the dominance of the 'Old Logic' (the Categories and On Interpretation) and of the importance of those two to the Metaphysics, I would say it does belong.