I like the orange!
For me, the orange adds interest and cheer.
I would change it up a bit, though. My idea would be to cut the orange in half and insert more of the smaller pieces here and there throughout the quilt. I would make it an odd number of pieces too, with 3 the minimum. I think having just 2 large pieces the same size as the blue pieces makes the orange too flamboyant. Think accent color, which needs to be a bit smaller.