> I think the problem with the 343 concept art is that it does not feel like any other halo in the saga.
> The forerunner structures are triangular, sharp and polygonal structures, the 343 ones are just rectangular and linear, even circular.
> The forerunner structures have like a “semi-hidden” core and some kind of “armor/exoskeleton” hiding it, what gives it an air of mystery and power, while the 343 ones are just rectangles with vertical/horizontal decoration and doesn’t look like they are functional, just decorative…
> Halo 3 Forerunner structures
> Halo 4 Forerunner structures
This is the point.
Each Forerunner rate has extremely distinctive architectural styles. The vast majority of architecture we’ve seen from the Forerunners has been from the Builders, while Halo Wars and Halo 4 shows us Warrior-Servant architecture, and the Keyship from Halo 2/3 is a Lifeworker vessel.
Then you’ve got the Miners who have a completely different style of architecture altogether. The Gatherer is extremely similar to what Bornstellar describes Miner constructs to be like - aesthetically displeasing with groups of of grapplers, lifters, and cutters on their underbellies. Forerunners also used stone to craft some of their temples which can change shape and form, like the Temple of Abiding Truth that Phillips is in on Sanghelios in The Thursday War. This sort of thing was also seen on Delta Halo during Halo 2, but in an inert form.
Forerunners don’t just have one style of architecture, you know? The same way we don’t have one style of architecture. It varies greatly across cultures and time, and the Forerunners have been around for over ten million of years as a space-faring race. We have seen the smallest glimpse of what they’ve built in a time period of about 10,000 years. We’re obviously going to be seeing things which are a departure from that as we see deeper into their society and technological capabilities, it’d be terribly dull if we found ourselves in the same grey buildings again and again every time a Forerunner structure was encountered…
Also, context needs to be taken into account here. Requiem was the very first Shield World created and it came about even before the Human-Forerunner war, Shield Worlds proper didn’t even come around for over 10,000 years following this.
How exactly are the spires impractical? They are mobile command stations which can move across Requiem, their geometry can be totally reconfigured, they serve as data attenuators to regulate the flow of communications, can relay command instructions from anywhere in the Shield World (like providing shielding over the Ur-Didact’s Cryptum), and can be used to protect areas of importance.