Random Brawl sucks. 2 minute Brawl as only supported gamemode, and you're forced to wait 65 seconds just for a chance of a third/fourth person to come. It goes like: 5, 4, 3, 2 !!! New joiner! And then the timer restarts. Darn that! Due to lag, you're not able to play to your fullest potential. And when you're in a 4 player Brawl, you'll always find people that use power types, especially Ike. They do this merely to steal kills better. And thats what sucks about time match. Brawls are never mostly about skill, but mostly about kill stealing, making characters like Sonic and Pit the most useless, while they're normally pretty damn good characters.
Seriously, the only way to have a decent match on a random Brawl mode, is to fight 1 versus 1, and you have to be lucky to get that, because you're forced to wait 65 seconds for a new player, and sometimes bots even get trown in! If you have a 4 player Brawl, you'll just have a random outcome. Nintendo should have either given players the option to choose whether they want to play duels or brawls, or they should make stock the default game mode.(No, not make it voteable, otherwise n00bs will always choose time matches.)
...or both, of course.