I don't mean to rain on the parade or anything, and thanks for the interest, but are you aware that all of these changes would actually result in rather large buffs for ranged? The arbalest for example, would become the most accurate weapon in the entire mod. Also, I'm kind of baffled as to why you think throwing should lose accuracy. Last I checked, throwing was not only incredibly inaccurate(so much so, that it's more appropriate to congratulate the person on the receiving end of a HS for a nice catch), but it also has very slow projectile speeds.
Why make things more inaccurate, which essentially just increases the affects of RNG and reduces player skill? You're just increasing the frequency of random headshots which certainly don't make players enjoy the game more. When I get HSed, I want to know it's because the player was aiming for my head, not because his crosshairs were on my feet and "just got lucky".