I'll start by saying I'm a big fan of all the new starter class presets and the new abilities. That being said, the rogue still need work. The invisibility, poison stab, and retreat skills are all great. The problem is there's no progression for it. There's still nothing in the Ranger skill tree for the rogue. You're almost better just going way of the warrior and playing a stealth warrior and calling it a rogue. Unfortunately thanks to the way stats and ap work that means having to go str and you cannot really do an effective melee dex build.
You're quite correct that there's no progression, but the upside is that the lack of higher-level skills means that the Rogue doesn't have to invest more points.
That does not mean that the Rogue is dull to play. Those three starting skills are fantastically useful in combination with each other.
The D:OS Rogue is most certainly a glass cannon. Give the Rogue an up-to-date dagger, and the few skills they do have makes them fantastic at burst damage, much faster than a warrior. The weakness is that they can't take hits well, so look for +CON items for them, it's a huge help.
Guerilla gives a huge increase to damage when attacking from Sneak. Normally, it's hard to Sneak in the middle of battle, which is where the Rogue's Invisibility skill comes in handy. Turn invisible, move behind the enemy, Sneak, and wait a turn to save AP. You'll probably still be invisible when it's your turn, at which point you attack their soft, vulnerable back. It does massive damage.
I have 8 DEX - not much at level 7. A Push Dagger is listed as doing 22-36 damage (per hit, daggers can hit twice). If you land a Sneak Attack, you can do 192 damage. TWICE. It does take 6 AP to prepare this attack, but that's 384 damage for the cost of 2 AP to perform the attack. Sometimes, still on the same turn, you can re-enter Sneak mode and have enough AP to do a second sneak attack.
