My God, this is so immensely frustrating in every community ever. Staff always coalesce into this private marble tower society bullshit with nothing but the slimiest excuses for transparency. Staff talk should always be fucking public, not half-assedly and occasionally so. It should happen somewhere with archives easily and readily available (i.e. Discord) to anyone who is interested enough to look, or otherwise it won't happen.
I'm convinced it's too late for SCP staff to adopt any real transparency. By now, staffchats are their own private little pleasure islands, completely isolated from the rest of the site where rulers can remain hunkered in for half a decade without peeking at the site once or knowing what is going on outside. This mutual separation breeds idiot tyrants with too much authority and too little purpose.
An issue in SCP-ES (Spanish site) too: for the longest time, they had all but one person consistently working on anything at all, and all the talk secluded to a private staffchat. Took literal years to get a fucking critique team online. And every time a user prods for some updates or actual work to be done, they receive a passive-aggressive exasperated response saying that staff are "very busy", when half of them have not done anything for ages.
RPC is genuinely the best at this and they still have problems -- at least visible and clear ones. Completely public stafftalk archive, with an emergency chat for when it's truly necessary, with all the opportunity to be prodded and screamed at by users. It's certainly not perfect -- half the Site Staff team have no evidence of contact with Wikidot in months, sometimes years -- but it's way, waaaaay better than any alternative.