Imagine if cawl just took the tech that mind coppies ppl and makes the "ai" and just did it to the Emperor Caz thats something i could see him asking guiliman to help with
The thing weve seen is individual worlds in th imperium are perfectly willing to skirt the rules fir their own gain, at least unless its a daot ship then they just mindlessly kill with out a first thought let alone a second. If the tau can integrate themselves then the unsc can as well.
I don't know if they'd be willing to use Spartan tech well the tech that turnsyou into a Spartan, but imagon if the sisters of battle decided they were cool with Spartan tech. They'd become even more terrfing than they already are since they already can use some if not most of the marines arsenal already.
Be kinda hilarious if somehow even in the grim darkness of the far future Astartes and Arbiter still found some kind of common ground and went on a combined crusade against the Prophets.
Does the UNSC get to FINALLY mass produce the HRUNTING/YGGDRASIL Mark I ADS Prototype Suit? Because that thing can be piloted by a non augmented human and was insanely effective.