The inconsistencies still stop the principle from becoming concrete, as what's to stop someone basing their chain on something such as Kaioken x3 Goku VS Vegeta or Oozaru Vegeta VS Goku? Whilst the examples you presented may seem more consistent, I feel that if there's some internal logic to be grasped from scouter numbers and feat gaps/chains, there was a distinctly different internal logic at work in both arcs they were used.
Following on from that, there's the elephant in the room being the Z-Warriors' numbers at the start of the series. Whilst you could write them off as outliers or Toriyama not polishing his new idea yet, that in itself, along with the feats in the Saiyan Arc contradicting gaps in the Namek Arc, shows a pretty clear fact; these numbers weren't intended to be used in previous material, even in retrospect. Furthermore, trying to base the new system on the scouters for Part 1 has another flaw you even mentioned in regard to gaps not automatically determining a fight. Along with skill playing a higher factor in fights than it did in DBZ, there's the fact that the scouter readings were based on a person's Ki output. How is this supposed to correlate to Part 1, when about 80% of the characters have no skill in or knowledge of Ki?
That said, applying even a selective scouter logic for Part 1 doesn't add up when this part has far more variables to take into account. Overall, making your own personal system with it's own rules in regard to gaps not influenced by the original makes far more sense.
I do, however, agree with your chain. I would say that ranking fight gaps and tiering based on it makes sense by itself. Expressed numerically, especially with scouter influence, is something else entirely though.