I'm noticing a trend with the vast majority of workshop items and it's that a lot of the designs are heavily gravitating towards sleek, ultra-modern looks. While I certainly think the quality of the design for Destrier is top notch, I feel like it's aesthetic doesn't fit with the game very well, along with the other designs that are also modern-ish.

It can be argued that because of other accepted designs that this is no longer or should not be a concern, but I think otherwise. Warframes have generally had a very organic design that was a blend of sleek and organic looks to it. Excalibur's base helmet pretty much embodies that, being completely smooth by contrast without sharp edges and bits. Ember, Zephyr, and pretty much most frames before Mirage hold to those designs. Not only that, but this design is almost human in appearance; the curve and point above the dark metal "chin" resembles a nose, which kind of defeats the uncanny valley aesthetic that a lot of Warframes have as well. This just reminds me too much of a future "high tech" helmet (which again, reminds me of the other designs on the workshop). It's way too human and not alien enough in my opinion. Plus, all the sleek lines and lights don't really go with his body mesh either.

Less subjective, but I think the helmet could stand to have some additional width, either with additional horizontal planar additions or bulking up some of the side meshes. Easier said than done, but Oberon's original helmet had a great deal of either width or verticality; this has neither and doesn't fit well with the rest of Oberon's 3D mesh.

It looks pretty good, but it misses the mark on keeping with Warframe's design imo.