Surely the fact that there was a laughing smiley and that I copied your underlined red text indicated to you that it was a joke and that I thought you were being overdramatic?

a) I hadn't discussed the methods of blocking that I would advise in the system I proposed so I don't see that you could assume that I wasn't going to say you could block with either. Although personally, I don't see the point of being able to block with both weapon and shield or with either weapon since you shouldn't be allowed to block and attack simultaneously anyway. That would REALLY break the combat system.
b) The limited implementation would add an attack that may be faster and/or can have a better range than a kick (depending upon the weapon used), that is blockable if the player chooses the right block direction or is using a shield, but which will not necessarily be the attack direction they are expecting and which varies depending upon the off-hand weapon chosen. I think this is interesting enough, easier to implement, and sufficiently different from a kick to be used in many situations that a kick can not. A spear could be used to hit the opponent at range without incurring the minimum range penalty once the enemy moves close since you'd have a shorter weapon in the other hand, but at the penalty of sacrificing the shield. A dagger or short sword could be used with another weapon to get in a quick attack with a piercing weapon, a falchion or handaxe a quick slashing attack, all of these likely to be situations the opponent is not necessarily expecting and can add to the player's ability to overwhelm the opponent with attacks. Also, there's no chance of abuses like the 'kickslash' since you can't simultaneously attack with the main weapon.
I don't know why you're not picking up on all these possible uses for a single-directional offhand weapon yourself. Perhaps you're not particularly interested in developing strategies within the combat system of the game anyway, and you're just after more novelties.
c) You haven't demonstrated that anyone thought it was sensible make extensive use an offhand weapon anyway. Even the main-gauche is called a 'parrying dagger' for a reason. Giving it the ability to stab and parry pretty much covers everything you'd need with a main gauche, short sword or a spear. Perhaps if you desperately wanted there could be a button to quickly switch which was considered the main weapon by mirroring the animations, unlocking all the attack directions for the offhand weapon, reducing the main weapon to a unidirectional one, and retaining the damage or weapon proficiency penalty to the off-hand one to simulate unidexterity. Perhaps there could be a skill added called ambidexterity that reduced the penalty to the off-hand. This would elegantly provide ALL of the functionality you want, just not simultaneously for both weapons. This would also satisfy people who want to play a left-handed character.
Look, I'm going to summarise everything to you, Urlik, and I'm only going to do it once, because you should have been able to understand all of this from my previous posts already.
If you're going to make a suggestion to a game developer that is:
- Not a priority to the developer
- An extremely questionable addition to the setting
- Only really likely to be extensively used by mods
- Extremely open to abuses in multiplay
- Not considered effective enough by anyone in the game's setting to be considered effective in the game with a few minor exceptions
- Another suggestion already adequately covers those exceptions at a cost of much fewer of the disadvantages

- A HUGE overhaul of the current system in terms of both coding and animation
- Strongly disliked by many players for several of the other reasons presented here
You have to balance this by making a well presented suggestion that has as many of the following as possible:
- A decent evaluation of the effects on balance in every game mode
- A very detailed explanation of how the system would work
- An explanation of measures to take to prevent abuses of the system
- The ability to be used in and improve every game mode - what is the point of spending a huge amount of time altering the combat system in a way that affects only one game mode
- A compromise that removes some of the desired functionality and thus the necessity to do a lot of work, at least to start with
Since I'm not a HUGE DW nut, I probably won't present my suggestion for an implementation in a detailed manner in the Privy Council, so don't accuse me of hypocrisy for not following my own rules because it's not MY goal to have DW added to the game. I won't mind if it is in a sensible manner, though.
So far you have provided the keys you would use and want the ability to do everything with the offhand weapon you can with the main weapon (possibly even simultaneously, explanation not detailed enough), bar the ability to equip certain weapons depending upon stats, which is not what I consider a detailed explanation. No examination of the effects on balance, no examination of the effects of abuses or measures to counter these other than to remove the suggestion from all except one of the game's modes, no compromise on functionality.