Ilyan Nastase the half-Eldar Ultramarines Chief Librarian, dancing Ultramarines, Inquisitor Obi-Wan Sherlock Clousseau, and the deodorant Land Speeder model need to come back, though.
Thought we would get more 1st-3rd edition designed/upscaled kits via Horus Heresy but they did bring Nastase back as an Ulthwae Eldar Farseer ambassador to Guiliman.
Rogue Trader started as Sci-Fantasy in space with cultural satire, not left or right wing (90's killed true left wing/right wing-New Labour led to "New" Conservatives but Uniparty) , but all sides of UK society through the 80' at the Late 80's then 2nd/3rd edition solidified the more recognisable 40k elements in early to mid 90's:
Imperium being "the establishment" lions led by donkeys sentiment of WW1, hanging on to the Glory days of Empire, decline of once great towns and cities etc,
Orks football casuals hoardes of boys turning up just for a scrap, chanting and singing that turns into a roar when they see the "enemy"
Eldar 80's Anime, New Wave, Androdgeny, healing stones
Squats: biker gangs
Chaos, mix of the above with hedonism plus drug of choice that were prevalent in each subgroup who would've appeared in the pub-angry Ron was apparently name of local bouncer-cokeheads/roid rage Khorne beserkers, junkies Nurgle poxwalkers-Aids still a new/limited info thing at the time too.
Tyranids and Necrons were Alien and Terminator references.
It all had a tongue in cheek approach that was essential to the setting, that the larger than life scale ridiculousness of it all, that even if apparently Grimdark, was still based in a comedic light.
The big changes came mid 2000's across all media, where everything had to become more grounded, realistic or to have more overt social messaging, no more good/bad, now its misunderstood scholars etc. The other thing was the legal/copyright cases which to me, was the main reason for any and all range replacements, particularly the Primaris.