I too, agree that the colors are not reminiscent of D.va, be it her jumpsuit or MEKA.
The current renders are much more reminiscent of the other Diva, Hatsune Miku, to the point I thought the streamer introducing your set was assuming it was D.va because they didn't know of Miku.
With the game featuring Miku aptly named Project Diva as well, you potentially have a couple of more companies that may go after you, just saying.
Might want to start with renaming the set, to like GMK Belle Delphine Gamer Gurl Girl or something.
With all said, the set itself looks nice.