I actually like the new suit, It's much more functional. I think the Jim Lee's designed suit is a reflection of real-world aspect happening in comic art today. From Nolan's actual technology "Dark Knight" costume, to the the rendering of wrinkles and textures onto photo-realistic digital drawings in most of today's comics. The metal bustier and hot pants were dated. I agree the original always will be the iconic Wonder Woman. But, the fact that most fan-boy illustrations of Wonder Woman were first of a nude pin-up model, shows the impracticality of it.
For years I wondered when Wonder Woman ,who is considered to be part of the DC Comics trinity with Batman and Superman, never given a seriously storyline like Batman's HUSH or Superman's "RED SON". The answer might be that the character like her costume, was stuck in the past. Her new suit will bring better and more mature storylines. I am not sure why Stracynski re-did the origin, Although it could be interesting to watch Diana eventually rediscover her origin.
This new suit, because it is so functional, might open the door to the Wonder Woman movie that has been stuck in development hell for years. A young actress might now be more willing to play the role since the suit is less skimpy and more serious.
Now, I will not hear another person say, How could she fight in the bustier and shorts without her junk falling out!