That would be amazing. I don't particularly care about voice chat, but I know some people do, so I hope Nintendo just adds it already to alleviate some bitter people's backlash. I want Splatoon to do really well, because I want the servers to be busy, and I want Nintendo to know there IS demand for this type of game.

Yeah, there's a lot of hypocrisy around the voice chat issue.
Nintendo should definitely add it, but a lot of people are using bad reasonss, that don't accurately reflect how VC is usually used and that many of them usually don't even partake in, as their reasons to get it included.

The biggest flawed reason I've seen is that Splatoon needs it to coordinate with team mates. (despite the Game Pad and customizable shoutouts covering all the info needed to coordinate)

Whenever I see that reason used, I can't help but laugh a little.
I mean, if we're really being honest, many either don't use VC, or do use it, but only for annoying things like trash talking or off topic chatter that just clutters the air waves.

Team coordination through VC, in most public matches in shooters these days, is so rare that it's practically a joke.

And when these people who misuse chat pop in mid-match, which is on a time limit, that results in precious seconds wasted either finding a hiding spot or delaying a respawn, to open a menu and mute them.

Hence my earlier proposed solution.