I think it's a lot better to put all those replies in one reply, personally. I do find the style of posting you're describing as having a quashing effect on lower-volume posters. But that's my personal take, not a Policy Take.
But like I've said, I think the better move is to have thread by thread ground rules, rather than a big bludgeon of a policy.
And I simply asked if was policy and you replied that it wasn't. It seems pretty simple, really: no policy change.
As it is also not my personal take, I am starting a Book Club in a chat room for those who are more like minded. I fail to see how my starting a Book Club is requesting any policy or rule change on the part of the forum or how it could be construed as such.
I read through the rules in the Book Club section and it said we were encouraged to do live chat book discussion and post transcripts or summary in the Book Club area. I hope this is still the case.