Impactful Attacks

[Shurrikhan]

Though for me the lack of any ragdoll, knockback, staggering or collision is far more significant to the lack of "impactful" feeling in XIV's skills than the underutilized and untermastered combat SFX, I think the latter's the only one with a real hope of change in this game.
Sadly, I don't say that just because it's an MMO; others have pulled that off decently well.

That said, I feel like every move in the direction of improvement would be an boon both in long run and short, e.g. giving back multi-hit skills multiple hits, and giving a reason that they might perform differently than single-hit skills other than just wasting single-hit buffing abilities like Life Surge.