First I’d like to post the Flanking Strike / Larcenous Strike update history to make my point a bit more clear.
Game-Update-Notes-April-30-2013
Larcenous Strike: Deliver a quick strike that steals up to two boons from an enemy. Costs 1 initiative.
Larcenous Strike, Stab skills: Reduced aftercast by 0.5 seconds.
Flanking Strike skill:
Now evades and delivers one strike instead of delivering two attacks.
Removed boon removal.
Reduced initiative cost from 4 to 3.
Now toggles for 5 seconds to a second skill, Larcenous Strike, if the attack hits an enemy.
Improved reliability of flanking strike.
Game-Update-Notes-June-25th-2013
Larcenous Strike: Increased the initiative cost to 2.
Game-Update-Notes-October-15-2013
Larcenous Strike: This skill now steals only 1 boon.
Game-Update-Notes-September-9-2014
Larcenous Strike: Initiative cost of this skill has been reduced to 1.
Flanking Strike: This skill now must successfully hit a target before giving the thief access to Larcenous Strike. Initiative cost has been increased to 4.
To summarize the initiative changes
Flanking strike
- From 4 to 3 (4/30/13), from 3 to 4 (9/9/14)
Larcenous Strike
- 1 (4/30/13), from 1 to 2 (6/25/13), from 2 to 1 (9/9/14)
Initiative costs were reverted back to how they were in their initial implementation on the patch risk was added to the skill.
Larcenous Strike was weakened by removing only 1 boon from the target because it was possible to use the skill on missed Flanking Strikes, hence it was too strong and there was no risk to it.
On the 9/9/14 update however, risk was added to the skill, initiative costs were reverted but no change was made to the amount of boons the skill removes. Given: the risk of missing the skill, the current high boon state of the game and the lack of boon stripping I believe it should at least be considered to revert the skill to its original potency, while still keeping the added risk to it.