Why wasn't Heavy Thrust merged into Impulse Drive?

[Berethos]

Honestly I hope many of the PVP combos become a reality in PVE.

Could work for the melee chain combos at the very least - not so much for Bard outside of putting our two dots together in a single button, and I'd think some of the casters might find it more cumbersome than useful for more than a few specific abilities.