Minox's idea is good but I feel that it doesn't add much depth into the game.
Currently the classes that have disarm/dislodge mostly revolve around dirt kicking and knockdowns.
You throw in a skill that instantly removes enemy's parry for 1 tick AND melee damage and you just got a replacement to dirt kicking. Remember, one of the reasons dirt kicking (and blind) is so useful for melee is due to its effect on parrying. Melee PK would revolve around disarm + spam knockdown, which isn't a lot of improvement.
And dislodge continues being useless until shield blocking becomes more relevant.
I will take the opportunity to redo my suggestion:
Beforehand, switching gear while IN COMBAt should grant 1 round of lag. Example:
> Bob switches a dagger for an axe: 1 round of lag
> Bob switches a held item for a wand: 1 round of lag
> O. Peter switches a spear for a bow: 1 round of lag
> IF target CAN be disarmed: weapon drops to inventory (which means enemy loses 1 round to wield it again, that's to counter macros)
> IF target can NOT be disarmed: decreases weapon skill and parry by 10% for 3 ticks, effect stacks and refreshes with new casts. If the stacks reaches 100%, wither limb's weapon effect is automatically applied to the enemy. (which means enemy will have to use restore limb or survive without a weapon for 6 ticks)
> IF target CAN be dislodge: shield drops to inventory (which means enemy loses 1 round to wear it again, that's to counter macros)
> IF target can NOT be dislodged: I don't think there will exist any noremove shields, except for quest gear. But if the option is to keep them around, then it should work in the same fashion as disarm but decreasing shield block by 10% and armor class by 20 for 3 ticks, stacking up to 10 times, plus the wither limb effect.
* 2H weapons grant bonuses to disarm and dislodge (like 5-10%)
* The player wielding the heavier weapon receives a 5-10% bonus in the disarm check
* The player wielding the heavier weapon-shield receives a 5-10% bonus in the disloge check
* Offhand items should also be disarmable - be them wands, staves or bows.