I mean as a standalone game, Splatoon 2 is an addicting game with tons of fun to be had.
As a sequel, it feels more like Splatoon 1.5 to me, and besides Salmon Run, I feel the game barely has any new, significant content.
"Just for comparison Uncharted 4 was 20x bigger than Splatoon 2. This shows the huge difference between Sony's first-party games and Nintendo's first-party games."