Guild Wars 2

Hard to Catch You instantly break the first incoming stun, gain .25s of stability, and gain 50% endurance. Your next dodge travels twice as far. 30 sec ICD.
This keeps the spirit of the trait while placing control of the mobility component in the hands of the player.

Last Refuge When your health reaches below 25%, gain feathers in your F1 slot if it is empty, and you lose the revealed debuff. 30 sec ICD
This implementation makes it useful for a wider array of builds, and puts the control of the stealth in the hands of the player.

Opportunist You can store one additional stolen item (this trait adds an F2 key to the thief interface) You deal 10% more damage with bundles.
This removes the weirdly unintuitive proc funcition while keeping the fun bit of flavor that allows extra bundle damage (stolen skills are still not considered bundles) and expanded pseudorandom wackiness resulting from steal.

I believe that the above trait changes would keep the power level of the intent of these traits while fixing what makes them unattractive, and that changes like these encourage the skillful and in-the-moment decision making and resource management which typifies the Thief class.