So having thought about this for 10 mins:
Double WRS 50m round shooting days may well be sparsely attended, as they count for nothing.
International Archers shooting nothing but 50m will drop out of the rankings.
The fact that this has come so late means that 70m shoots may already be full, and so some people can't get the shoots in - which is where I am, I suspect.
There'll be archers missing from the rankings this year. Sorry, AGB - own goal.
EDIT: Have sent an email to all the T/Os of shoots I'm attending this year to canvass their views on moving Double WRS 50m shooting days to UKRS 70m instead.