Im trying to be constructive, Anet!
To give a statement in the Name of (likely) all meta/spvp thiefes about the changes:
1. The nerf on the stolen items is survivable. Maybe the time-nerf on the item of the ranger is a bit to drastic, because of its importance as water field in structured team-fights.
2. You (Anet) added 3 seconds on the recharge of WITHDRAW, because of the viable trait to reduce the recharge of tricks (20%), didnt you? But no meta-thief will choose it, instead of the boon-ripping on steal. So its senceless to nerf that, just because of its alleged healing-strenght (in comparison to the healing-signet of the warrior really ridiculous…) withdraw=4800hp heal Healing signet=6500hp heal in 18 secs.
3. Replacing LAST REFUGE with MERCIFUL AMBUSH is just such a bad idea. In high ranked pvp it is NOT the role of a thief to revive the people and it will never be. Lost minor trait. LAST REFUGE is way more better to keep the squishy, damage-dealing thief alive.
On the other hand I dont have to list all the positive aspects of the upcoming changes (larger range of steal, double usage of venoms, etc.), it would cost to much time and they will come anyways
As little tip for Arenanet: The first proposal of the revised trait-lines were perfect in view of high-ranked thief-gaming