Finished the main story. The final Boss felt great, very good challenge. Every other boss felt lacking, it's like Zelda's find it's weakpoint and it's basically dead already. But that final boss man..
I've sick of playing online now, I've been winning constantly with the roller (OP bro.) Decided to switch it up a bit with other weapons but they aren't those crazy fun weapons to use they are just boring rifles.... I hope we get more fun weapons in the future that are as creative as the roller.
The game really doesn't have that much Squidling customization as I thought. Most of the outfits are plain boring clothes I'd find in my closet or someone's else closet. There's no hair customizations, and all the cool items are rewarded once you finished the main story or used one of your Splatoon Amiibo for their outfits. (I thought I'd find outfits on par with the Squid News Girls. STAY FRESH!

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Local play being on 1 vs 1 is terribad, had so many friends who wanted to play this but had to settle with 1 vs 1. Why can't we do 2 vs 2? Or try 3 vs 3? Or pull a Nintendo land and have games like Hide N' Seek or Tag or something that makes use of the 1 vs 4 playstyle or something like that. This game has a ton of opportunity for local play games, but they choose to focus on online instead. :/
The main story really could had benefit from a Ratchet and Clank playstyle (earning money to purchase new weapons, and being able to use the whole arsenal of splatoon weapons), and there was no need for a secondary hub world to unlock the actual missions. Finding the hidden sewer pipes was annoying and didn't even teach you about new obstacles in the later levels because all of this stuff was shown beforehand in other missions.
Other gripes:
Can't play with my pro controller (I understand why, the advantage of warp hopping during online play. There still could be ways around this control wises, very disappointed about this.)
Your Squidling doesn't have any other kind of pants to wear. Your stuck with the same black shorts and nothing else..... Weird gripe, but really?