I would like to know why do you think that the Governing Body is "tweaking" the scheduling of meetings?
My theory is compromise.
The conservatives are wanting to maintain the hard-core 'the end is nigh' . This is why the last couple of year DCs have had restrictive themes.
The realists are wanting to mainstream to keep relevent for the next 100 years. Building a better printing plant (3-7 year project). Removal of 1935 creates the problem of more then 144,000 partaking and the WTS will eventually allow all to partake. Blood is on its way out. The GB can continue to recruit replacements forever. This change makes our schedule look more like Christendom's Wed/Sun meeting schedule.....
I think eventually we will resemble the Mormons in the sense of building membership by retention and larger families.
The goal of the WTS is not to 'declare God's Kingdom is near" but to maintain and grow it's coffers.
BTW I doubt the GB has any real power, only the perception that the legal department allows.