I’ve been using Sleight of Hand quite extensively now and really love it. A lot of other thieves find it crazy that I would go 30 deep into that line just for the daze on steal but it works very well for me as one of the few instant cast interrupts in the game.
My main issue with this trait is when it is combined with Bountiful Theft. If the enemy has Stability and you have these two traits the daze is applied first (which is blocked by stability), then the removal of boons when I feel that as a Grandmaster trait, it should be the other way around. I think going 30 into this line and taking that trait justifies it as a counter to those who have stability.
. Prep LS and then mid-cast of LS hit steal to strip 4 boons right off the bat.