I'm really not liking how Nero's Charged Shots aren't color-coded. 
When keeping track of the charge in DMC4, you immediately know if it's Level 1, 2 or 3, based on the color. 
Here, you kinda have to second guess and "look closer" to see if the blue aura is still charging or is finished. 
Not a very good interface, compared to instant confirmation in the previous game. 
There's a reason traffic lights are red, yellow and green, not different shades of blue or blinking at a precise interval. 
Nothing beats color-coding to instantly recognize something on the fly.