Well after all that information and I don't think I answered your questions. No I don't think it is paper piecing but instead foundation piecing, is it hard NO, could you sew strips together and then cut out the triangles I guess you could. If I were to do it like that though what I would do is cut the kites out, sew the strips together, then sew the rough strips to the kite, once both sides are sewn onto the kite THEN trim it into the triangle it needs to be!
Good luck, let me know if you need/want more info.I would love to see everyones work when they start making one!