*sigh*
1. So basically nothing at all for almost ALL choices in the game bar ONE, quite early.
Yeah, I agree: SIGH!
Yes, that one early choice is really important for this branching. By its nature, content in a branch is (usually) only available if you're in that branch (the same was true with the content from patches 0.71-0.73, which had nothing if you didn't tell her about your heritage).
If your contention is that branching should not happen due to single choices, or only to recent ones - that's terribly restricting creatively, and also leads to the "it doesn't matter what you did the rest of the game, only which (colored) choice you made at the end" problem various RPGs have been dinged for over the years.
If it's the "every update should have something for every branch" - unlike some other games that have big but infrequent updates, this one releases on a regular (semi-)monthly schedule, usually with 3-4 new events (of varying sizes), so that would lead to very short content per branch, a trade-off at least in my opinion not worth it. Better signposting for which branch(es) an update is relevant in the changelog might be a good idea (but requires people to actually read the changelog), and the flowchart addresses that need as well.
2. "If you bothered to check every single page for this game..." Fixed it for you.
0/10, doesn't make sense. The information about the flowchart is in the first post of the previous page, as well as the second, #6, #7, #9 and #11 - which is also the release post. That release post, with a detailed explanation of what the flowchart is for, is also the top post on Patreon. An escalation to something like "check every page" could work if the process to discover them were unreasonable, and not "check the last few posts before posting in this slow-moving thread".
Unless you wanted to poke fun at yourself/others that didn't do that - kinda works for that, but then it should've been a bit more over-the-top.