Maybe too much to ask but does that mean improvements like this are likely to carry forward into future games?
If they are built off the existing game and engine, then yeah. Depends on the level of difference though - for example where Kingmaker had a static camera, in Wrath you can rotate it, and that will carry over to Rogue Trader.
But for example you can't carry over any UI elements there, because Rogue Trader uses a completely different dice system and mechanics, which require a different UI.