The armor design is far more appealing to me than the one seen in Halo 4 and 5. This is the first time 343i has given Master Chief an armor I don't dislike.
On a more important note, the word "plastic[y]" in the context of Halo armor. For over half of all armor iterations, there has been a group of people saying "it looks like plastic". Though it wouldn't surprise me if there was someone who thought the Halo CE, 2, or Reach armor also looks like plastic. But here's a little secret: matte painted metal really does kind of look like plastic. Now, if you don't like that, that's fine, but you might find yourself not liking the appearance of a lot of military equipment, which very often happens to be painted matte.