In the grim darkness of the far future there is ony war

Ever since my teens I've had a long-standing interest in Warhammer - as teenagers with more money than brains are wont to do. Although that interested has waned in more recent years, I still maintain some degree of interest. That being said, the Warhammer universe, both Fantasy Battle and 40k, has proven to be fertile ground for game settings over the years. But my problem is that they’ve either been shooters (ie Space Hulk, Space Marine) or strategy games (ie Dawn of War, Shadow of the Horned Rat).
If anything, I would really like to see the Games Workshop give the green light for a roleplaying game. It is indeed a crying shame that they won’t because I find both Warhammer universes solid enough settings for an RPG. So why aren’t the Games Workshop doing anything – aside from inspiring rival companies to make their own Warhammer-inspired IP? (Warcraft anyone?)
Okay, sure there was Warhammer Online but if history has taught us anything it’s that if you’re a MMORPGur that isn’t World of Warcraft then you’re Dead on Arrival.

Whilst the Warhammer Fantasy Battle world is a decent enough setting it may be difficult to say something new when similar worlds exist *coughAzerothcough*. Therefore I really want to an RPG set in the 40k universe: It is far more volatile with every faction are out for themselves and little to no sense of unity (with the possible exception of the Imperium of Mankind), and thus makes for a more fascinating setting with tonnes of potential.
If we go by the Mass Effect model, I would certainly like to take a ship and travel from one end of the 40k universe exploring many of the planets therein. There is a decent enough lore and many recognizable locations that would sweet to see rendered in computer graphics.
There is certainly enough races in the 40k universe to build up a decent party of NPCs. Indeed the diversity would be a key selling point because a party built solely of Space Marines would only be interesting for so long.  But if the diversity comes into play then who would the player control? A possible solution would be an Inquisitor – his party could be built up of henchmen and killing daemons certainly holds a lot of appeal. But an even better option would be a Rogue Trader – it presents a substantial grounding for a diverse party. And better still, it offers the unique opportunity to describe the 40k universe through the eyes of an outsider who isn’t tied to any faction – or at least an average Joe.

And I just pulled that off the top of my head – so why on earth aren’t Games Workshop green lighting something like this?!?!?