That's fair but I don't really have empathy for Halo 4/5's art style at all. That change was extremely abrupt from the series' identity and a clear mistake. Halo Infinite looks like a needed return to what was already established first. No crime in that.
I know they are doing what many people asked for. I just think 343 are basically retconing the new art style in order to bring the old back. Just like they done when Halo 4 came out, it's too abrupt change.
It is not "new", in fact they are using old stuff back. I think 343 put themselves in a difficult situation doing this. First they change everything in Halo 4, then change everything again in Halo Infinite. Of course, we have not seen everything yet, just engine trailers and no gameplay. But for me, mixing the two styles is the smartest choice they can make, bring all eras together so the feeling that things just disappears and reappears with no reason would be fixed. Let's wait and see how they'll do it.That is exactly what they are doing. It's definitely a new blend of the armors.
The body armor is a direct mix of Halo 3's and Forward Unto Dawn's. And the Helmet blends both the Halo 3 and 4 designs.
Both are taking heavy influence from the original trilogy and I think that was smart of them.
They are restoring Halo's recognizable identity and giving fans what they've asked for. Not sure how you don't see that.
When I say mixing I mean real mixing. In Halo Wars 2 for example you could identify things that are from both eras and still they coexist fine together. From what we have seen right now, Halo Infinite looks straight up Halo 3. The changes are barely noticeable.
Also, if you watch the BTS video for the E3 2018 trailer, you'll notice they went about Infinite's art style in a very similar way as Halo Wars 2. The silhouettes of everything are familiar and inspired by classic designs. But details are new and completely fresh. The back of Chief's helmet is a great example - it's directly inspired from Halo 4, and has some new details as well.
I'm almost sure the Helmet design from the E3 2018 is different from E3 2019. The 2018 was a bit of a mix, but the 2019 is everything Halo 3. Rough comparison.
The thing I think Halo needs is consistency right now. Character changes and inconsistencies, story changes, art design changes, gameplay changes. Along the way too many changes were made and it kinda hurted the worldbuilding of Halo. What I think 343 needs to do now is to focus on a single direction and go with it and the best way to do it is to still keep everything that happened canon and stop doing retcons, lazy lore explanations and stop making things disappear and put everything aboard to the Halo moving forward.