IMO, it is arguably his best looking set of armour ever. I think that people generally prefer the classic art style, and it has stood the test of time for a reason. Halo 3 is still a fantastic-looking game even though it is almost 12 years old. Ascalon VIII
has already explained in detail why the newer design is more realistic/believable. In addition, it's not like 343 is just switching things back entirely. If Halo Wars 2 and the footage of Infinite that we have seen is any indication, they are going to incorporate elements from the Bungie games and the expanded universe, with a hint of 4-5. Also, when 343 thought that this
was an appropriate armour design for a Halo game, you can see why people started to question their creative choices.