Well rogue can find a lot of useful synergies and there is a lot of options for him. I'm keen to say he is the only class for which 8 advanced skills are not enough
Your build looks good, explore different options and find whatever suits you. Keep in mind you can fully reset your traits and skills at any point in time, so you will have a chance to adjust.
It's not loke ppl are not using stealth.
I've used it as a one of the critical skill untill smoke bomb was added and I ve pissed how poorly it works considering 12 points cost vs beasts regen and respeced ignoring this skills completely.
If someone would ask me
Go for skills directly impacting your base dmg like crit improvements, stab, assassination, flurry and add a bit of defensive capabilities like evasion and body development - this is a core and maybe even a must. Beyond that you can add many different flavours like stelth, poison mastering, traps or archery - depends how long you would like to play and how many skill points you will get.
Regarding traits, just one advice go for agi but don't overrate it. I prerfer balanced traits set. At some point when you will already have massive dps and decent armour class its nice to be flexible and have advantages of other traits at hand.
Gl and enjoy