I played it, and it's not that amazing, however, I am not Nintendo's target audience.
It's definitely not a shooter game. You spend a lot of time just painting stuff, and killing people didn't really seem to matter as much. In fact, you could strategically use death to respawn behind the other team and win that way.
Controls were terrible OR gimmicky. I'm sure they'll allow more controls, but aiming with tilt as the main method of aiming is SO BAD! You could only move left and right with the right analog, no up and down. Definitely uses tilt.
I destroyed the other team getting like 15 kills in a the second match that we got to play after I got used to the controls. Even then, the final result was almost even, just slightly favouring my team in terms of percentage of painting the level. So I really feel like this isn't too much PVP as it is just passively shooting up floors and walls.
I do enjoy the squid mode of travel and loading up ink from squid mode, but the overall mechanics available feels really shallow that I can definitely imagine myself getting tired of the game real fast. They definitely need more that painting mode.
After playing a bunch of indie games that are like this quirky shooter kind of game, and they were free, I guess my opinion of this new IP isn't in high regards. It needs more content for sure.