Someone propably has cried over this one, but I cannot help myself....
I cant understand the reason to remove these from stats and move them to basic skills with your basic benefitting stats STR and AG. One of warhammers uniqueness was that a character that wasnt STR hulk could be very good in melee indeed.
The first problem with moving WS/BS to basic skills is the argument over which stat should benefit it. I'm gonna draw some examples out of kendo, but most of these examples can work for pretty much for any melee skill or ballistic skill
Slashing with the sword fast and strong has very little to do with STR. It is all about technique. Slashing the sword in exactly right way. Actually in kendo STR is the least beneficial attribute. (I'm currently desperately trying to use less strength, as forceful strike is usually very lacking in technique)
If anything could attribute to your fastness, it could be AG (as in initiative). Yet again a more skilled fighter can read your moves, so that even though you're naturally fast your clumsy technique gives away where you're going to attack.
Not so surprisingly WP affects your battlestance. If you're weak willed and unsure of yourself, you will make too sudden moves and open yourself for attacks. Or make half-hearted attacks, cause you're scared of the strong willed opponent. Also a strong willed fighter can "force" the other to action with his will. Push him to attack too soon for example.
Even T attributes to weapon skill as wearing armour, breathing technique etc. can wear you down prettty fast.
A fighter with high INT is a creative fighter, fast learner, good at spotting where the opponent is going attack next.
Reading your opponets attack style is much the same as reading your opponents manners in haggle, or bluff with FEL. Of course the other one could be bluffing or acting that he is bolder attacker than he really is too for example...
All these attributes affect the fighter, because when you fight intensively your whole body and mind is in the fight. But it would be awkward to have a benefitting stat that would be counted from all stats. Besides, you don't need to have good "stats" on all these attributes to be a very skilled fighter, what matters most is how pure and perfect your technique is. Your weapon skill.