You raise some interesting points. However, I'm still betting that, given that so much here has to do with volume, pressure, and time, the plugging of the ports will have more than simply a minimal effect. Even though they do go nowhere, they increase volume and decrease pressure inside the valve.
Besides, the mod is already finished!
I'll be posting more on that soon.
I want to think more about your slotting of the top bolt. Most intriguing, but may be too good to be true. A number of things seem to speak against it being very effective. Also, I've not considered the "shock buffer" scenario you paint. I'll look at that more closely. You may well be correct.
More to come!