Left:←I use the left down right key setup too! I put my left and right middlle fingers on ← and → and my right index on ↓
right:→
dash:↓
because it is more easier to control
It seems to be an unorthodox way of playing, but it's preference.
EDIT: I'm just wondering.
Have any of you guys actually changed the way you play even after you "thought" you had an established playing style? I've tried going back to default settings and my hand is not programmed to JUST dash with the left and move left and right with one hand.