The design reminded me more of one of the Hyperspace Ring things that the Jedi Starfighters sometimes used in the prequels, but for starships, not starfighters. But the thematic association to Outhbound flight is definitely there.
Even riding around within another galaxy will be difficult. Star Wars travel relies a lot upon carefully mapped routes, which is why the wildspace regions beyond the Outer Rim stay largely unexplored. Blind jumping unmapped routes is very hit-and-miss, as in you might either hit or miss a star before you emerge.
C'Boath seemed a bit more ... unhinged in my memory. Unless you mean the original one, not the clone. But it is a good point - maybe when Baylan is talking about power, he is indeed talking about the kind of power clone C'Boath was speaking of.
They've touched on it, in the Rebels episode where they find the Lesatt homeworld. They run into a serious obstacle on the way, but once they've been there once it becomes mapped (for them, at least) and will be a straight shot through hyperspace thereafter.
I'm more expecting an existing civilisation, the same ancient one already referenced, with Thrawn having wormed his way into a senior position. Possibly a civilisation that wouldn't mind taking a shot at expanding into the SW galaxy if given the opportunity. Hopefully not the Yuuzhan Vong.
Or more like an hour or so in The Last Jedi.
