I generally dislike how AoE kits are handled in 14. I find "same as single target but aoe" abilities just boring and lazy. Deep dungeon aside, there's almost never a time where you want to hit just one enemy and not any others, at least there's no downside to hitting more than one. I honestly wouldn't mind your suggestion. That said, I do miss how DNC worked in ShB where flourish would proc your aoe and single target flourishes so you'd have to be in melee range for 2 GCD's but that's a different discussion. I really just don't like having 3 or 4 extra abilities that function identically to other buttons in your kit but are AoE. It's just button bloat.