First of all welcome to the forums! Here are some observations I have of the costume that I think you could improve.
1. Looking at the cape from behind it almost looks like there are two capes all together. This could just be the way the cape is draping, but it should just be one cape.
2. I'm not sure if you have 2 tunics or not, but it should look as though you do.
3. I know you said the positioning of the knot is wrong and you'll be adjusting it, but it also looks too small. The knot should also not really look like a traditional knot, it should be one smooth piece and not really look like a true knot.
4. The boots and gloves look good, but could use some weathering. The gloves especially look a little shiny.
5. Finally the mask itself really is more of a KOTOR II version, not the COTF version.
All in all these are things that can be pretty easily adjusted, and if you need any more help please feel free to ask.