one-up himself in terms of angst and drama.
Not sure why you think that, but that's never been the intention. Heck the last arc the drama was minimal with the gangs being an easy fight and the Taozin escaped from easily enough via some quick thinking.
Especially when it feels like it's happening back to back
Lets see...
The krayt dragon was at the end of book 1, a year ago. Vosa was 4 chapters back. So they're not back to back, though I do admit that things haven't gone Cam's way in this book, which is intentional to show the galaxy isn't as safe as he thinks.
those super special powers of his
You mean Observe and Inventory, because those are the only ones that would qualify. The first he uses still, and the latter isn't something to use publicly without getting a lot of questions. Though both being blocked by the Sith mask Vosa had was different.
Cam and Fay over the inability of the Force to sense their opponents
When would they have time for that? In the few seconds from Cam, using Observe until they attacked? The whole point there was that they didn't have time to react. Hence why Cam used barrier as just because the Vong have no Force Potential, why would he think/know his standard defensive power wouldn't work? Or that he used what was familiar to him on instinct.
As for Cam not sensing them easily up until the appeared, there is maybe time to voice that, but not to discuss it. Or how, if the Force can't sense then that he can.
canon Yuuzhan Vong storyline in the Legends continuity really pissed me off.
They are diversive I know. But they are a part of the EU. And this won't be their invasion. This is just taking an EU event and altering it due to Cam's presence.
The Vong's nonsensical villain sue stuff is only necessary in an environment where Jedi and Sith are ripping apart capital ships and making stars go nova
In my opinion, exactly. The things Force users can do in the EU mean they generally are untouchable. A race like the Vong generates a problem that forces Force users to adapt.
the last 7 months in the Sartr with a deadly combination that is Bo and HK for company
I'd say that's the perfect place to leave a Sith-bred war hound

.
I would expect him to keep them at his person all times, bar at the Temple; tuck them to away on his belt by his back OR put(hid) them in his Inventory (not to mention the other blaster pistols & rifles); he could've look as though he draw either one from within his robe/cloak. But given Bo's suspicion about the grenades, it's almost understandable why he didn't.
Except Fay won't let him carry it currently. Dooku would but Fay doesn't. Which is why it's back on the
Sartr. As for the Inventory, yeah he's being cautious around Bo for now about hidden weapons.
If Bo's helmet records everything that's going on, hopefully Cam might use the recording of his encounter with a mysterious, hostile, Force-immune sentient species as proof to the High Council and the Senate that the galaxy should prepare for war. He could lie that they are preparing for a massive invasion. If they refuse to believe him, Cam could simply turn to the more militaristic factions, like the Tarkins and the Mandalorians. Heck, he might need to warn Plagueis to disrupt Sidious' plans in some way
Bo's recordings are going to be useful for the fallout after the arc is over for sure. And as for your other suggestions, they certainly have merit.
protagonists will always be getting into situations, but jesus it would be nice if he could just cleanly win the occasional situation, rather than just outright lose every time or earn a pyrrhic victory at best. Characters can develop and grow from things besides torture and painful loss.
Yes, but not every situation can be resolved easily. Otherwise, there's no growth. I grant that Can last few major battles (I don't count the gangs/taozin) haven't gone his way. But he's learned from them and that will, I hope become clear as the arc passes (over 5 chapters in total).