DemonAtheist said:
I only read the first page of this thread, sorry if I am repeating something.
the reason weapon sizing makes sense is because different weapons are proportioned differently. In mathematical terms: great swords, b4stard swords, long swords, short swords, and daggers are NOT similar. NOT!!
a small weapon has the same proportions as a medium weapon, but it is (wait for it...) smaller. Daggers are not small short swords.
its geometry!
Actually, you could argue that they are. regardless of proportions, your aiming for the same tagets, for the same effect.
daggers and shortswords operate on the same priciples, but at a different range. When switching from a shortword to dagger (example, a large bowie knife [think Rambo] vs a bayonet) one just has to take into account the difference in weight, length, and balance. This is not difficult (a few minutes at best) and your aiming for the same points. You even use the same grip (talk to people who have used both the european saber and the japanese katana {a one handed vs two handed weapon}). Shortswords and daggers (D&D rules aside here) have been crafted to use the same types of damage (piercing and slashing). The shortsword gives the benefit of increased range, but operates in the same manner.
It's in this manner that someone who has studied in one type of weapon style can pick up other styles as quickly as they do.
The same could be said for switching from longsword to great sword. The mechanics are the same, but the weight/speed differences need to be taken into account. It's harder to adapt at this scale, but the difference is how fast you can get back on the defensive after you strike, not how or where you strike your target.
this adaption can also be seen across disciplines. This is anecdotal (most of my evidence has been of late. sorry 'bout that), but I know of a friend who took fencing for 7 years (no hand to hand training, mind you). He was at a bar one night when someone took a swing at him. Without thinking, he brought his hand up to block (parry one), then punched the guy in the nose (thrust, at least as he told it). On this note, a halfling could just as easily use a medium rapier as a short spear (typically only the last 4 to 6 inches of a rapiers blade was sharpened, but said halfling could wear gloves if you play otherwise).
My point: If a weapon is similar enough to what you can use, you can make due with little effort. try it yourself, with a baton and a bat. The physics are the same, and you have no problem switching from one to the other (and most of us don't have combat experience!!)
Now as for smaller scale: how many of us have been stuck with a tack/hat pin/replica letter opener? Using a smaller weapon isn't that hard, if you think beyond it's design.