I genuinely like this idea, because it would allow to reach both goals.
The problem I see is that this would probably go down the same as the bodycam idea, with inconvenient recordings vanishing due to “technical issues”.
You’d need an independent third party doing life recording and delayed release. Subjectively, the US don’t have a great track record with these.
Easier idea: Just publish last week’s encryption key. Probably won’t happen because some tech supplier will lobby for a more expensive solution.
In light of this, and since you were able to work through the not-so-stellar episodes of ST, I’d strongly argue that Babylon 5 should be your next stop.
It has a slow start, some more mixed episodes, dated special effects and both main characters (they switched after season 1) are plain “heroic American leader” types, but virtually everything else is top tier even today. An excellent political plot, humor, great characters with genuine growth.
Just be aware that it is different from DS9 (personally, I like both).
Battlestar Galactica (the new one) and The Expanse are probably worth pointing out, too. To me, they’re the best high-production-value sci-fi shows that didn’t sacrifice their plot. Nevertheless, both are far more grim than the shows you’ve mentioned and overall “feel” different.