TLDR version: Tier lists are just guesses due to humans being incapable. Even top players don't agree(proven by the chart).
You could introduce an error range of 0.2 in the last column and your results can shift wildly. The data I compiled (and duppy too I believe) won't make this very hard at all.
This is one of the reasons why I say this isn't how you go about making an accurate tier list. You're basically averaging a small sampling of mildly educated guesses. You're also comparing them in ways they weren't meant to be compared.
If you want a matchup chart based on this, start by taking every match up and averaging their scores and making an actual 10 point chart based off the averages. For example, Sion vs VSion, start with the averages given, 5.75:4.75. Add them and you get 10.50, thats 5% too many points. Keeping them in the same ratio but adding to 10 you get 5.47619:4.52381, rounded to 5 decimals. Do that for everyone and you have a matchup chart that adds to 10. Lastly, for the KoHi column, assuming the different values are for who is on point, you'd have to take the lower of the two since someone using KoHi to their best potential will be using the better of the two on point.
While matchup charts are good information to have they aren't good ways to determine tier lists. They usually get close, but by no means are the end. For example, in a ggxx(#r?, not important) chart, Slayer was listed as the best, and Eddie second best. Slayer had really big advantages against crappy characters, but did have a 4 or two in there. Eddie had nothing below a 5, but since he didn't have as good matchups against the crappy characters he was ranked lower. I'm not saying this list was wrong, I'm just saying it rewards things disproportionately than I feel is important. For example I feel moving from a 4 to a 5 is a lot better than from a 7 to an 8, while this system rewards them equally.
I doubt any human or group of humans is capable of reliably accurately making a tier list unless it is glaringly obvious, but even with something seemingly obvious I wouldn't put it past humans to miss something. It's all based on opinions, it's just there are different opinions(even among the best, as proven by the chart), and different ways to manage those opinions(as proven by this thread). You can do whatever you want with the numbers on that chart, but I'm not going to agree with it as a way to determine a tier list no matter what you do with them since I disagree with the opinions on the chart in the first place. You might coincidentally come up with a list I agree with, but I still won't be agreeing with your methods. And if you bring up my wake-up preferences again I'll counter with your shield preferences and counter-hit with the top players in the chart obviously don't agree with the chart outside of their own row.
You can't use a huge round robin to come up with a tier list. It might show about how well the best with each character are doing, but a tier list is about realistic potential. Theres also upsets to worry about.