Hola, I too have been trying to make ranged weapons more realistic in all the games that I play, and most recently in RQ6. (That was my post on the RQ6 forum that you commented in.)
I pretty much agree 100% with all your comments on the topic, but I want a fairly simple way to implement it. (Your combat style idea should work very well as a start.) The range chart looks pretty good too, but seems like it may add a bit more complication to a system that's already pretty involved. I may try it anyway, but I hope to come up with something a bit less charty. (yes I made up that word.)