This isn't Baldur's Gate, Dragon Age, IWD, or other rpg. It's a new system. If you don't like, it you don't have to use it. I personally love the new stealth system and like it for what it is.
And as a poster mentioned, rogues are not meant to start fights and realistically, that makes total sense. If a guys pops up out of nowhere and attacks a group of people, he is going to be quickly dead. Rather, stealth works so that your entire party can get closer and engage at optimal distances, whether it be close enough for melee or for a ranged volley into melee while the rogue can flank. If you take the time to actually learn the system, it works very well.