For some reason I expected a rework of an item that nobody uses. Looks nearly the same.
Flamescar is only good for incinerate, an attack speed independent skill.
By not using a 2 handed staff, the player loses 20% base damage
Additionally the flamethrower aspect becomes practically unusable on a one handed weapon. +70%x damage on two handed gets -14%x (minus) on 1 handed.
The embers are hard to integrate, because most incinerate builds are focused on damage over time.
I would claim Flamescar is the only skill unique which lowers your dps with that skill.