It doesn't look etherial at all! First it's too thin and i imagine Etherial blade more like a massive double hand weapon than this piece of stick. Also it doesn't look etherial it looks poisonous! These little green drops around it makes it a venomous sword.
And what the hell is wrong with the current Etherial Blade icon?
It's an agility weapon, it completely suits something light and one handed, it looks no more venomous than Ghost Staff, and the current one is low quality and doesn't fit in with war3's style particularly well.