I don't strongly agree but do agree. Could possibly go as far as each 50m for the first 200m. Variable mobile speed is a bit of an issue. Personally I'd probably still use my eye, knowledge of a horse and reading of what each driver should be/will be doing in the race rather than a lead time but can see benefits.

They can go hand in hand but what I'd like to see most is 200m sectionals. So if race is 2300m we have the first 100m sectional and then 11x 200m sectionals. If race is 1950m we have a 150m sectional and then 9x 200m sectionals etc.