I wonder how they came up with the number of .000112 new cases per inhabitants over 14 days. It means countries with little testing could potentially be cleared for very wrong reasons, and it begs the question how often the allowed list will be refreshed (and how dependent territories are counted).
Arbitrary limits are sadly unavoidable if you want fact-based rules. But when it's not a round number (e.g. .00014 i.e. 1 per 10000 per day), it smells of picking a number based on countries to allow or disallow rather than rationality.
Of course, what remains most ridiculous is the lack of transitivity. AFAIK, Germany has reopened the border with all the Covid-naughty European countries (Spain, France, Benelux, Italy), so if Finland reopens the notional border with Germany, err...