CosplayerGabi is right. I see no problems with the costume. It is SUPER!! XD
Just the wig should have been longer. But as I have seen, you have new wig for Sailor Mars cosplay in your gallery.
What needs to be remade? It looks very nice already. The dip in the skirt is accurate, the bow is shaped perfectly, the gloves are the proper length. Almost everyone forgets at least one of those. You did a great job. I hope I can make a Pluto as well as you did Mars.