I could care less about leaderboards, personally. I'd never be able to make it to the #1 on the list simply because I dont have the same free time as some other die hards. The lowest time ranking is completely different from a win/loss record. You dont have to spend countless hours to show that you have the biggest dick on the Smash Bros. leaderboards. Mario Kart is all about getting the lowest time. You DONT have to spend countless hours honing your skills to show off how you're the best. Plus, Smash Bros is a little too random to be able to get a fair win/loss ratio, in my opinion.
Plus, what about the other extra features Brawl online has? Getting stage builder levels, screenshots and replays at random or even WATCHING people fighting and betting on who you think is going to win. Even if its a crapshoot, just like real life gambling. Most of those features happen in the background, you can get messages for things like that. Obviously not for whether friends are online. But heck, I guess thats what IM programs are for these days. But people are so lazy that people would wish that their 360 systems (Or whatever they choose) played games and cooked their TV dinners while having a picture-in-picture showing of the game and some other TV program. (Maybe a reality show for the casual viewer?)
Like I said in the Mario Kart thread, Smash Bros. is about syncing the other players together. Mario Kart just interprets whats going on. In Smash Bros., you wont find turtle shells going straight through other players with no effect because all the players are seeing the action 1-1. Whereas in Mario Kart, the turtle shell appeared to have passed through a player on one screen. When in reality, the victim never got hit on his screen. If he does, theres a second delay for it to register for the shell's owner.
As for voice chat. So what? Talking in the middle of most multiplayer matches could get you killed. At least in the text based days of games like Quake, Unreal and so forth. Its not like Nintendo is up for releasing any microphones for the Wii anytime soon. And I doubt people would like to spend $130 to connect their DS for chatting. Waggling the Wii remote in a pumping fashon whilst talking on the DS (Hopefully not in the sense of the gameplay mechanic of BLOWING on the system, the combination could be something masterbatory) is not the solution I'd want to see. Sakurai doesnt work at Nintendo anymore, so he might not share the same ideals as some other divisons around or in Nintendo itself. Its possible the Wii could have voice chat, if there was a microphone.