Personally I find the selling point of roguelikes to be the trope of learning mechanics and itempool and then breaking it over your knee and figuring out how to pull the odds into your favor so you can become a god.
None of that here! It's clearly built with the purpose of appealing for anyone so the upgrades never feel unfair and are generally always stat boosts which can help you. They also change the values depending on which weapon ur using so you can't make your own unique built its pretty pre determined how the designers want you to evolve. There are also lives! A lot of them! So the fear of death and restarting is close to null. Without the ability to express yourself in upgrades the only enjoyment I found was in the level design which is unsurprisingly fantastic. Although the variety can be lacking and you may feel like you've seen it all after about 3 hours.
It feels a bit disappointing after octo expansion but I can still enjoy this and I have bigger issues with it generally not being a very good roguelite. And considering how unique splatoon has been in the past its interesting to see it evolve into a pretty predictable roguelite format.