Like I said, I'm not saying there's any reason to go a full week without any posts (even non-substantive screenshots a la the Moo Deng post from last Friday) but... I think people take for granted what goes into some of these posts. There's probably multiple rounds of review/approval, careful consideration to what will/won't work as far as content and timing, etc. What reads to us as a "two-line message" can take hours to put together. They could have an idea for the text that a person reviewing it absolutely hates and they have to go back to the drawing board.
Like, that Moo Deng post? The idea came, then they had to request the art from somebody, figure out what exactly to say, etc.
I do think it's really odd to go a full week without any activity at all especially after how news-heavy the week before was. Though maybe that's why this happened: "Last week was so hectic with PZ! Let's take a break and focus on PlanCo2 exclusively." It's a bit misguided, but I could see that happening. Especially if they just have 1-2 people working across the socials.
I can totally understand if any of the things you are stating are true. They are likely understaffed and overworked at times. I don't particularly blame the workers in any way, but the decision making is lacking whether there is one employee churning out every animal or dozens working on every species.
To me it makes no sense to show the keyart in the stream and post the next day that news is coming soon.They built this hype train themselves and the "outrage" (for lack of a better term) is self inflicted. They chose to highlight the keyart and the new pack over a week before another hint would be shared,really before anything is shared at all.
Typically teasers were explained within a day or two, and if we don't get news today it will be 10-14 days of a tease being unanswered. I'd rather have never seen the keyart and kept with the attitude of "'The DLC will come when it comes because they said later this year." I was expecting something but not consistently checking and growing frustrated seeing moo deng as the only news for a whole week.
Personally, I knew something was coming from the announcement of another animal pack later this year. I didn't need the keyart to tell me something was coming. All that did was get me excited enough to check daily for absolute silence in terms of community engagment. For months, I just checked every now and then for news.
I think most would be much less outraged, and much more sane, if Frontier posted that teaser image today as a world animal day celebration and said stay tuned for an announcement and posted the trailer next week (if ready). That gives us a few days for hype and avoids 4-7 days of why is there silence as we quietly grow more frustrated with a lack of communication.