There is no inconsistency, the NDA limits what employees can leak to the public, it doesn't mean the company itself cannot release internal information to the public, that's the whole premise behind the concept of company PR.
As for Elon Musk decides everything, well duh, he paid tens of billions for it, of course he gets to decide everything. Musk haters cheered repeatedly for the court to force him to pay billions for twitter, now you guys find it hard to swallow that he gets to decide everything inside the company he paid billions for? Tough.
I think we'll just see what happens in all those employee lawsuits.
I agree with you that Elon can decide whatever he wants, but advertisers can cut out too if they don't like what he decides. Like if you get bad service at a business, you can take your $$ elsewhere.
I assume employees won't be pushing lawsuits, NDAs issues nor spouting their mouths off if they actually got what was promised to them vs. (from what I've seen), Twitter not holding up to the terms they were laid off on. Are we seeing any other cases of these NDA/lawsuits/layoff problems from any other tech firm? There's been a lot of layoffs. I also read about Twitter not paying their other bills to suppliers/property stuff/cleaning staff, etc, but I'll not state that as truth since I didn't redo research on that.
In the end, we'll just see. Elon does look like someone else to me in the sense that he'll disagree with everything until real lawsuits proceed (Solar roofs price raises, Elon backed down after being sued and will lose that case), Twitter purchase back off after signing away all his rights (Elon was sued again and in court so had to buy it because he signed papers he'll buy it without contingencies), etc...
I don't find it hard to swallow at all and he can decide to do whatever he wants. I just find him and a lot of folks hypocritical when the folks supporting him are biased too (like the Tesla charging standard, now he wants to open it up because another standard is around without folks having to pay Tesla an unsustainable amount of $$ early on).
On his purchase of Twitter again, he pretty much signed off all his rights to buy it so he should've and was forced to buy it. If it was your company or something affecting you, I think you'll have a different stance.