I think that looks fine for that kind of hi-ressing, since there's so limited colors. But in general, I use the extra space to apply more detail, and even missing detail. The game that started the hi-res craze for me was the PSP version of FF1.
http://www.spriters-resource.com/psp/fin...eet/38479/
Not only did they double the resolution of the WonderSwan/Origins/Dawn of Souls sprites, but they also added a lot more visible detail to the character graphics, such as the hair and outfits. I sort of use this as my role model when I do hi-res versions of other sprites. Probably not the best for the 8-bit stuff, if retaining the palette, but I feel it still has that general guideline for me.
http://www.spriters-resource.com/psp/fin...eet/38479/
Not only did they double the resolution of the WonderSwan/Origins/Dawn of Souls sprites, but they also added a lot more visible detail to the character graphics, such as the hair and outfits. I sort of use this as my role model when I do hi-res versions of other sprites. Probably not the best for the 8-bit stuff, if retaining the palette, but I feel it still has that general guideline for me.