The high-heel are great. In them are high-tech nanites which give perfect balance and support. She also used them for difficult aerobatic jumps, dodging, and wall-climbing. Plus, she can use them for the "Dance of Death" fighting-style she learned while she being raised by her famous ex-assassin Grandmother.
Haha XD indeed. I have always found it absolutely ridiculous when they're running around in high heels, looks awkward. But I felt it worked with the 90ish design on this one, for a touch of "makes no sense" in the design. Well, that is the entire feeling of the design I reckon haha.
She kinda does, but maybe I'm just getting that after reading the title. Otherwise i'd say it's the colour scheme, red, white and blue. Then again there's no white on her costume and Russia shares it's flag colours with france and the uk and the usa and... etc.