Just for this post, I do not hide this because it deals with the theoretical part.
I would take it with this hexagram if its possible. In my view its very good.
Did something related to it happened on 8 sept (when the void ended)?
If a void line can really turn solid when the void ends in 10 days or so, then nothing is void, or everything will have full strength. We must distinguish between a real void and fake void.
Mao (the second line) already has no energy. It's overcome by Month and Day. When the void ends, it's time for Mao to be weakened by Shen Month and Shen Day.
ren, I agree with you that the second line represents the business.
About the void, Jack chiu says that a void line will be out of the void after 10 days period, in case it is an active or changing line. In this case it is an Active line, then it will come out of the void, in theory.
He says that when it comes out of the void the line "becomes effective", i.e. capable of imposing relations (sheng, ke, Liu He, Chong, San He...)
Certainly when Mao-Official comes out of the void will be in a very bad status as Shen is also his disappearing/vanish stage of life (vanished and dead by both, Month and Day). But as "THe Monk" said, another of Liu Yao's applications is the look for the right moments to start an action. So in coming water months like Hai and Zi it could be good for Mao-Official.
In other systems of the Five Arts there are the ideas of span of the question.
So if we ask a question taking years, then the change of the year pillar plays its role.
The details of the effect on this in WWG are difficult to obtain, as I rarely ask for such long term things.
The Void we use is always calculated by the day, so far, yet usually in bazi there are 2 of them, one from year(what other people see as "unreal"), and by the day(the person seeing as "unreal", "not solid" etc)... In other systems there is even Void from the hour pillar.
We would technically have branches in void from all 4 pillars for each question, so are there situations where other void should be used in WWG?
For example for long term questions Year and Month take role instead of Day and Month, or Day and Year maybe?
Maybe for questions like that the void should be calculated by month pillar?
I work with the idea that rules in most sources have issues, I'm just testing stuff all the time, usually it goes unnoticed, Jlim comment on it now, so we got into it, but there are more questions in relation to how it works long term and only way to clear it out is asking when we have connected question/situation, sadly this one the situation isn't clear enough for me to get a stable potential rule here.
Overall, there are many unknowns and only way to clear it out, in my view, is to ask for different aspects of that and with years and practice it will fall in place.
Meanwhile much of the system is reliable enough to use, without holding back, even with the missing stuff.