Like I pointed out earlier to you, you're giving this very little thought...
Making the claim that voice chat is inherently useless because this game takes measures to supply some information to players is flawed at best.
And I'm still advocating for team chat mainly in the context that I'd like to have the option to easily chat and have social fun with the people I add online or in real life (an element of multiplayer which your downplaying of is quite frankly asinine ESPECIALLY in defense of Nintendo), without having to whip out my tablet and set up Skype or trade personal details like my phone number with people I've only met through a game.
If thats what wasactually happening, then maybe you would have a point. But its not.
Splattoon doesnt offer some visual information, it offers ALL THE INFORMATION, and it updates in real time, 60fps (Or maybe 30 for the gamepad doesnt really matter).
Where your team is, what and where they are shooting, where each splotch of paint lands, in real time, where ALL your enemies are, where they are shooting, each drop of what they are covering, ALL IN REAL TIME.
It is every single peice of information that is happening, and it is updated in real time.
Anything you say as a person, is already obsolete by the time you finish saying it in comparison to the real time updating of the game pad.
Kill/death counts dont matter, you dont get points, you dont lose points, and you can teleport to anywhere a team mate is at, or just start covering again from your base that got hosed. Killing people doesnt matter.
Again
Killing the opposing team doesnt matter. Its fun, but t doesnt matter. All stratagems revolving around the traditional concept of engaging and destroying the opposing team are pointless for splatoon. Getting multiple people who dont understand this angry enough to waste their time getting revenge on you instead of covering ink however....
And yes, again, Nintendo being your free phone service is nice. But thats all it is. Its a nice feature. I dont use on any of my consoles and I stopped using it on PC's years ago. Its just something I dont really care about anymore. When I want to talk to a freind, I will call them, most of my freinds have different hobbies that I participate in, not many play games, and those that do, dont really care for online multiplayer games. I had one person, who I would talk with, with mh, and we would shoot the shit, and it was nice. Mh4, doesnt let us do that anymore, but we still play, and we both enjoy it a hell of a lot, because its one of the best core MH experiences made.
The actual meat of a game, is something I care about very much, and seeing it being so downplayed for an arbritrary feature, is something I see as completely assinine, and I view standardization as a poison to my hobby.
The features arent the only things being standardized across platforms.