Current mini isn't too powerful, it's just ghey, because rapid fire hitscan with a cone like it has, and a RoF like it has is garunteed damage. That kind of thing is hard to balance.
Yes, the complaining did pay off because I much prefer the current mini to the UT mini, in the spirit of seeing this as more of a sport, and not a game, hence keeping in mind balance before "OMGRAPIDFIREDEATHONASTICKMINIGUNRULESWTF!!!!1!!111one."
They removed lockdown from the Minigun, so the only weapon with lockdown now is the Linkgun. Damage is 7/15. Don't remember exactly how many rounds it raps off a second, but the only thing that keeps it from being the most used and efficient weapon in the game is the SG.
Nail gun was awesome, and I think this will be UT's answer to it. Another good example of fast moving projectiles. Quakes Nailgun/Super Nailgun.