REJOICE, SHADOWErS

Well actually the Bstep delay is a cooldown of 2 seconds. This is how Boomerang Step works:

Time Span 2 seconds (2000ms):
-[0][0][0][0][0][0][0][0][0][0].[0][0][0][0][0][0][0][0][0][0]- (repeat)

Boomerang Step attack itself (400ms + 1600 delay/cooldown):
-[X][X][X][X][0][0][0][0][0][0].[0][0][0][0][0][0][0][0][0][0]- (repeat)

Boomerang Step (400ms) + 2x Savage Blow (1600ms) Combo:
-[X][X][X][X][+][+][+][+][+][+].[+][+][+][+][+][+][+][+][+][+]- (repeat)

New Bstep (400ms & 600ms Cooldown, instead of 1600) + 1x Savage Blow (800ms) Combo:
-[X][X][X][X][+][+][+][+][+][+].[+][+]- (repeat)

So the old combo needed 2x Sblow to be "allowed" to re-used Bstep, the "New" Bstep allows the combo to be repeated after 1,2 secs (with only 1x Sblow or BoT) instead of 2 seconds (with 2x Sblow or BoT)...

But Nexon did NOT fix this... -.-

oh so it's like those buffs with cd, ic ic