I'll completely agree with this post.
The midday activation was not pre-planned but an effort to accompany the content update announcement - which either way, should have been 24h in advance, meaning there would have been a full Double Drop day. This was short-notice, and we apologize.
It should not be the norm - with the norm being a full 24h Double Drop day instead (not nothing).
We will not return to a weekly double drop day, but will ramp up the options to double farm every time before a content update, to help players catch up. And that preferably for a full day.
Edit: Forgot to clarify: The running time was mentioned in the accompanying event text - I of course understand that usually players will assume it's a full day, but you should check the announcement text for running events regularly to make sure you will not miss details like this.