hi welcome and all. i really think these have some great colors and such. you are definitely on the right track. everything is in order and you have great brush control.. now however i would start working on blending or layering. this will greatly improve the look of your miniatures. from one tau painter to another trust me.... you are starting to do this naturally with the tau suit and the highlights of blue but start working more to push the colors. also consider where your source of light is and use that as a base to go from. the articles here have helped me greatly and i hope it works the same for you.
cheers
:beer:
uber