That's one thing about Samurai 8, it feels like it's the scale is meant to directly continue from Naruto's end point, without really considering that, as a new series with new characters, it hasn't actually built up to any of it. Feels to me like you're almost meant to directly relate it to Naruto's battles instead of attempting to be it's own thing with it's own sense of scale. Like it's doing things because 'look, this never happened in Naruto!' instead of 'this scene actually has a point in Samurai 8'.
I'd love to see a proper space-faring series in WSJ but S8 isn't the one. I wonder if wsj rejects anything that's a bit too similar to big stuff from other magazine, if they'd reject One Piece in space kind of series because of Eden's Zero.
Early Black Clover being an amalgamation of Magi and Fairy Tail among other stuff makes me think perhaps not but it mixed enough different popular series that you couldn't quite say it was directly doing one thing, it was more a summary of the past decade of shounen.