Disagree with me if you like, that is entirely your right. But be respectful about it or you run the risk of me ignoring your opinion by default.
I didn't make up a stat, we reviewed evidence (well someone else did, this pre-dates my involvement). For the record, I'm not old, and I jump putt. As I already stated, the conclusion of the discussion might well be 'do nothing', but without exploring options how can you tell if there might not be a better way?
To address your issues.
a) In 10 years playing I have seen precisely zero 10m circles marked. I can see how it will take a TD a lot longer to mark zero 30m markers. The fairway marker vs circle option would only require single flag to be placed, I think that would be faster personally.
b) No it doesn't. You have 30s to throw from when you reach your lie, regardless of what you choose to pace off.
c) We're tossing around ideas, some will be wacky. Get over it.
I'll state it once again, the justification for looking at this is not to be punishing players for minor infractions, or to get at pros and da yoof. It's that in an increasingly digitally recorded world infractions are captured and observed after the fact. We can shrug and wait for the winning putt at some future major to be seen as illegal live on the internet and messageboards flooded with people complaining before the prize ceremony has even happened or we can try to explore options for preventing it from happening.
I'm on the rules committee, I'm looking at rules, go figure. As UK national coordinator I look at all the other wonderful things you suggest