Like I said in the other coil thread. The product has a reputation and whether being old tech or revised or renewed it is still the history of the product that stays with it.
We had many cases of 1 or so dud coilpacks in a set some 3-5 years ago. That's why people choose split fires or OEM. They have a good reputation/history.
You want to bring your product back to having a good reputation then it's time to recruit some cars that can vouch for you.