instead of a Round-Winged Bat). I would also like the ears to be a bit more like the Bob Kane design (that suit is still one of Batman's best)
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I think ear length/style has always been an artistic/stylistic decision on the behalf of the given artist and I wouldn't want to change that for any sort of 'canon ear length'.
But the Kane picture here clearly illustrates (har har) the heavy use of blue needed to achieve all black.
Frankly I doubt a new costume will stick, especially if it's a huge departure, tweaking it over time seems to be a much better way to keep it from just being like that Electric Superman flop.