Well, the only thing we should be talking about here is this one extension. So anyone who subscribes their interest in this extension should only be getting info about this one extension, not about anything that doesn't interest them.
"All communications shouldn't necessarily be open to everyone. All communications don't need to be public."
I don't see a need for non-public channels for a FOSS project. That's not the way it's done. Individuals can certainly choose to talk with one another about details that don't involve others. For example : "Did you leave off that semicolon for a reason?" But more general topics should be open for anyone to consider and voice an opinion. That's how "open" software development works ... and yes, it is rather chatty but democracy is a rather sloppy process in general.
That said, if there are going to be other mvextensions, other than mvbasic, I would agree that a new room should be created to avoid polluting this more general room - but with a luxury of only 5 people having interest so far, I don't think that's a problem that needs to be solved yet.
My intent is to communicate how the rest of the world uses the technology. I'm getting a bit frustrated with going back and forth on this single concept of choice, with human communications and with client/server connectivity. I don't think you'll find a single person saying they do not want choices. You'll only find people asking for more options. (I stopped short of recommending Discord as yet another option, which is wildly popular in software development (as is Slack) but unheard-of in the MV world.) I recommended Gitter for people who already have GitHub accounts - and Slack for those who do not.
Again, choose your option but please don't try to restrict others based on your choices. If that is not something that the originators of this extension wanted or imagined then perhaps this shouldn't be a free=liberty and open (public discussions) package. And that said ... it's completely valid to simply reject suggestions. I volunteer that some of my suggestions might be invalid or simply undesirable, and I'm really OK with any suggestion getting rejected. So please don't feel like I'm trying to be forceful about anything either ... except about not being forceful. :)
Best to ya bud!