Please just do it.
These 2 buffs are terrible and a rework is necessary, not because of damage, but for the design of the spec.
Grand melee current buff should just become baseline for all specs. No one actually wants to press slice and dice.
Instead what grand melee should do… Either make your main gauche strike twice for the duration of grand melee, or the 2 piece effect of the shadowlands tier set, or increase the chance to proc main gauche, or further increase the attack speed.
Buried treasure could give either a % increase on your energy regen, or something cooler like an extra combo point. A real buried treasure. Not this 5 energy flat bs.
Nerf the overall damage a little to make up for this, so we get about the same dps after, for all i care, please just fix these buffs, they feel awful.