cba wading through all the QQ to see if this has been mentioned, but if the dagger is a 1.4 speed OH then it can be used by all 3 rogue specs and not just assassination.
Also about time rogues got something we have been shit on this expansion for a) being melee and b) having no burst whatsoever, meaning that in any encounter which requires target switching (almost all of them) and bursting adds down fast (most of them) rogues are useless.
Also yay legendary /dance