Interesting ideas. I'll address "Delayed Sword" as that is a Parker Technique we spent a lot of time on, and its variant for a punch, "Sword of Doom."
One of the things that hasn't been addressed in "Delayed Sword" is how you address the body momentum that accompanies the grab. The reasons for grabs initially are intimidation and limited control, therefore they don't take place in a sterile environment without significant contact. I teach this technique as a hammering heel palm driving against the body forcing you back, followed by a seizing of the hand to the clothing. Therefore in the assault you are struck in the chest, driven backwards, and then seized with the possibility of additional attacks.
Most don't even consider these things. Think about it. Someone slowly walks up to you, and grabs your lapel in such a manner it has no impact on your body whatsoever. Not only is that an unreal grab, but I doubt any of you would let someone get that far if they did it that way. No this technique is a surprise coming from stealth, that slams into you.
We employ distinctive stances, footwork, and hand Indexing to regain our balance and solidify our stance(s), while pinning his hand to our lapel. From there we strike to the head of the humerus of the shoulder, cutting across the Line of Sight to disrupt the visual Cortex and induce a PNF Sensor Reflex and Muscle Reassignment just prior to the strike. This single action will weaken him, open the Lung Point on the shoulder, and weaken the grip strength in the hand. Additionally when we pinned his hand, we also impacted a major PNF sensor in the other hand causing additional muscle reassignment by changing the shape of the metacarpals of the seizing hand. The striking hand remains on the shoulder to control depth for the next action.
All of this occurs on the first movement of initial retaliation.
Working from a solid stance utilizing specific footwork, we step FORWARD into a cat stance and execute a gauging kick between the legs. Because of the anatomical geometric variances in the length of the pinned arm, as well as the defender you cannot assign a specific type of front kick from 'arms length.'
If you step back into a cat stance, you cannot account for the forward body momentum of the attacker, and you are fatally misaligned and will be driven backwards into a possible grappling situation.
After the kick is delivered, you move forward in a Braced Index Position just prior to a right outward downward handsword to a specific point on the side of the neck to induce PMD, Physical & Mental Disassociation as you plant into a right neutral bow.
And for the record, you cannot control, stop, or account for a grappling response by blocking alone.