This would be awesome. I'd love to see some varied attack animations and could be connected to critical hits.
While I'm all for visual variety in attack animations, I'd rather see even the current skill tuned down a notch in terms of "flashiness" rather than adding more over-the-top stuff.
On a side note this is also tragically true for passive enchantments/buffs on equipment.
Few things feel "noisy" and annoying to me, from the visual standpoint", than having a late game party going around adorned like a bunch of Christmas trees.