if there are going to be 'anointed' on earth when the GT breaks out, there is no point in using the partaker numbers as an indicator of how far away or close the end is.
I agree that there is no longer any need to use the annual partaker number as a way of gauging how close Armageddon is, but that's a consequence of the revision of the 1935 date that came out earlier this year, not this newest generation tweak. I remember a study article 8 or 10 years ago that specifically said that there would be anointed on the Earth when the great tribulation arrived, and that they days would be cut short because of them. The 1935 date was the key. All of the anointed were supposed to be gathered by then and any new anointed that popped up were supposed to be replacements for the pre-1935 anointed that fell away. It became quite comical that the governing body was now being run by a bunch of supposed replacements (what did that say about the quality of the pre-1935 anointed?), so they scrapped the date. Now nobody knows if and when the calling will ever cease. Apparently, the door to heaven has been open all along and Jehovah has been selecting "new" anointed post-1935 after all. The post-1935 anointed aren't necessarily replacements. The article doesn't clarify where the notion of "replacements" now falls in JW theology. Is it possible that some of the current anointed are replacements while others are "new"? I'm not sure the Watchtower spoke to this issue. Maybe it doesn't matter anymore.
To get back to the earlier point, I agree with your overall point that the number of partakers no longer matters. For this reason, I expect them to stop publishing the number in future. The number of partakers now tells us nothing about how close we supposedly are to the great tribulation. Not publishing the number of partakers will also have the added bonus of making this embarrassing issue disappear once and for all. If the door to heaven didn't slam shut in 1935 there is no reason to speculate about whether someone really is or isn't a genuine anointed. It doesn't matter anymore. The Watchtower clarified that the anointed aren't any more special or have any more insight than a regular publisher. Jehovah only uses the governing body to lead his people. It also doesn't matter whether the number of anointed go up or down in a given year. There will be anointed on the earth when the great tribulation comes. And we will know that there are anointed around because the members of the governing body will profess to be of the anointed class. Case closed. There goes another embarrassing prophecy failure swept under the rug.