Yeah, angled downward was the original sentai show. When shipping the costumes over, the original shield got damaged, so they made a VERY cheap, fabric one. Being fabric, it was pretty poofy. It stuck straight out, or, in some cases, would even angle upward. I never paid much attention past the White Ranger season, but I think later Green Ranger stuff had a shield made that resembled the original sentai shield, but kept the fabric "straight out" look.
I guess it makes sense that it's the straight out look, since these are obviously MMPR figures, and not Zyurangers, but the angled downward shield definitely looks better. Thinking of getting just the Green Ranger, and if I do, the helmet is never coming off. It'll just be Burai to me.