People are sleeping on this campaign, big time. I played Splatoon 2 a few times over the weekend and I thought it was pretty fun. I only played the first Splatoon once a few months ago, and only for a few rounds of multiplayer. I wasn't able to get used to the gyro controls completely but I saw how the game worked and thought it would be really fun to get into Splatoon 2 once that came out. I spent some time with the multiplayer but didn't really get super into it. I can tell that it just hasn't clicked yet, it's not like I'm not having fun or anything.
What I thought was especially interesting was the single player. My friend already played through to the 4th world so I got to play on some of the more complicated levels. I don't really know what I expected from it, I guess I had expected more of a shooter but it's actually more of a platformer? And the platformer it reminded me the most of were the Galaxy games. I'm personally not a huge fan of the Galaxy titles, primarily because I'm terrible at them, but I see what the designers of the levels were trying to accomplish and the ways the game plays with just how you move Mario in 3D is very clever. Splatoon 2's single player seemed to be applying the same design philosophies I saw in Galaxy to Splatoon 2.
Both games have a few things in common. Tight, precision platforming with a focus on forward momentum segmented into sections by checkpoints describe both games' approach to most of their levels. In other levels, you have to collect eight objects (star/red coin/zapfish) to get the final object (star/zapfish). The ability to ride in the ink while platforms shift and rotate calls to mind some of the gravity mechanics in the Galaxy titles. Splatoon 2 even has some platforming gauntlets that remind me of the brutal Sunshine FLUDD-less levels that served as the basis for Galaxy's style. Splatoon 2's levels encourage replays for time trials and the like while the Galaxy titles encouraged speed running their levels for certain missions. The overworld even does that thing where it makes you legitimately hunt for your next mission (or Observatory), something Galaxy 2 dropped entirely.
I think Splatoon 2 lacks the grandness and the scale of the Galaxy titles but for fans of Galaxy that are a little burnt by Odyssey's return to a more open-ended style, I think Splatoon 2's campaign can soothe that. It scratches the same precision platforming itch that frustrates the hell out of me but I know a lot of people like. I really wasn't expecting this game to have a realized campaign, tons of guns, and a varied multiplayer mode. It really threw me for a loop. Part of me thinks people are sleeping on it because Splatoon isn't Mario, so no one's really looking at it. I'm really excited to go back to it in the future. I'm sold on the game just by the virtue of its aesthetic but I think the gameplay is capturing me in a really roundabout way.