Breja: They are members of the federation, have been for over a century, wouldn't that be common knowdledge available to all, something they'd teach you in the academy? And what makes their secret so special?
That's an easy one. It's against Federation and Vulcan values, evidently. That's why it was kept a secret: Out of shame to live up to those values. Out of fear you can't teach those if you can't stick to them. It's a dark and illogical spot on Vulcan culture, so they don't mention it.
Star Trek Discovery: So far, I'm in. I can't yet say whether I like it or not, but that is mainly due to the premise of the series.
The two pilot episodes aimed, narratively, at something completely different than previous ST pilots did, that was very obvious. It introduced us to the history of the Klingon war and the plights of a single character. It didn't introduce us to the series' namesake ship, or even its crew. Where previous pilots were awkward in their forced and prolonged expository sequences (I'm personally not a big fan of i.e. Picard and Riker's first conversation... it's like Picard is pouring out his heart to Will, and that's just not what he'd do), Discovery showed us a crew where things have 'clicked' long ago. I was delighted to hear that they've been together for seven years, mirroring the seven TNG seasons.
And I don't care what others think, the dynamics between Georgiou and Burnham rival even Riker and Picard's. Damn shame the experience is so short lived. I wasn't a big fan of that final battle and the way they got rid of Georgiou. That's not because it resembled Abrams' Star Trek movies,
but cinematic Trek in general. Like you, I probably would have wanted more of the serialized Trek clichés instead of a Star Trek VII, VIII, IX, or X finale.
But that may yet be to come. We have our main character very well established (and, yes, I like her a lot), we know why she'll be despised on the Discovery. We have our overarching plot, equally well established. And it looks like there will at the very least be glimpses of the episodic in this series (the return of a TOS character will likely be limited to one episode only, and then there's that little bombshell that blabbermouth director dropped, whatshisname... Jonathan Freak or something).
Basically, the Discovery series as of yet lacks discovery. I believe it has above mentioned reasons and will be rectified. If it won't be rectified, the series can piss off. :)
PS: Undecided on the Klingons. Yet another redesign Worf won't be able to properly explain. :)
PPS: I actually do like the Discovery theme. It's just that the reminescence at the end is particularly heavy handed. And I'm so grateful that we have orchestral music playing again during the series, defo not the worst. Berman had killed most of that in TNG. That spacesuit launch sequence theme? That was pretty damn great.