Can shape be corrected after a bbl has be done?(Square shaped buttocks sculpted into more of a rounded out heart shaped buttock)

I had a bbl done 2 years ago and the shape of the buttocks where they come together bothers me. The volume and projection are good, however the shape of the buttocks themselves at the base isn't rounded out but more of a squared, bulging shape. I am wondering if a full bbl would need to be done to correct this?(I don't want much more volume if any at all, jus a more attractive shape)there are also inconsistencies between the right and left cheek in terms of size that I would want addressed.