Just a short list of Costume Parts I have been thinking on.
Loin Cloths (For an 8 foot tall, blue, cat-faced, pony-tailed character. You know what Im thinking)
Deer Antlers. I see a lot of different horn styles, I think deer antlers would fit nice there.
Cloaks. There are a lot of cape options, a cloak is like a cape, but wraps around the front a little more. Take a look at pics and sewing patterns online for circular cloaks. I think the half circel (or, semicircle) cloak might be easy to reproduce in the game world. To get an idea (and I know youre probably not tailors, youre game designers), cut a half circle of cloth about to the back of the knees or to the ankles and then cut a half circle out of the big half circle you already have in the middle of the straight edge big enough to go around your neck (Use the length of a shirt collar to get an idea of how much (basically, the length of your shirt collarX2 and divided by Pi gives the diameter of the half circle you need to cut out for the neck)). I know it sounds wrong giving you the instructions to make a half-circle cloak in a thread for a video game, but you will see the big difference between cloaks and capes (some people cant tell the difference, as a cloak wearer I have met someof these people). Adding the Arcane or Occult option to it (like with the magical cape) would really make it pop.
Which brings me to my next thing. Add Occult to the hood option, just like Arcane is.
More robes. There is a good amount of choices for martial arts robes, but that is the extent of Robes. How about Wizard Robes. You could import the Witches Hat from the female build into the male build and call it a Wizards Hat along with it. Watch the movie "The Color Of Magic". They did a good job of portraying the traditional wizards robe. Although, now that I think about it, a Wizard Robe could be placed in a seperate category, similar to Magic Bolero.
Female Huge build. It seems kinda unfair that there is no female huge build. I understand that there havent been very many female characters in the comic books with the "huge build", I can only think of one.
While Im that subject, how about something to allow someone with two or more character slots to change one of those character slots from regular to huge, or vice versa. One per character. So that you can have a character who changes from his or her "secret identity" into their larger "alter ego" a'la Bruce Banner/Hulk.
You can sort of do that now. The super tailor from the store allows you to do costume transformations from one model to another. Say from male to huge. As for the difference in power and power level, that one is going to be up to you, I suggest turning toggles off if you want to have a less powered version.