That's not true. I've looked everywhere there is no evidence that Perci is replacing Blaze. So no need to get upset. For all we know Blaze might be in Sonic Boom but hasn't been revealed yet. And even if she isn't she'll appear in a future game.
This is my favorite Boom Blaze design I've seen so far. I just hope that Blaze looks something like this in Boom, and I hope they manage to get Laura Bailey to voice her like they did for most of the voice actors (Roger Craig Smith, Mike Pollock, Travis Willingham...).
Very nice. The pose and expression fit Blaze to a tee. What really catches my eye, however, is the colors; they're so rich and vibrant.
The clothes are interesting too. The only thing I would suggest changing is her shoes. Elegant and poised as Blaze is, it seems like some flat shoes would serve her better in the adventure-heavy world of Sonic Boom.
So when she's ruling her kingdom from home she's in her regal attire, but when she's out hanging with her friends she wears this. I can see that. And it looks like she's getting ready to lay the hurtin' down on some numb-skulled enemy who tried to ruin her and her friends' outing.