I was not expecting a new graphics engine with RT. So, I was not disappointed by "more of the same." In fact, I rather like the overall color palette used in RT. It is more muted than Normandy.
Along those lines, I like the terrain included in RT. The wooded areas are quite dense and can create some interesting close quarter fighting. I noticed that Battlefront included both "Russian" and "Eastern European" terrain but have not yet become familiar enough with the differences.
I think someone realised that CMBN Normandy terrain was a little 'bright on the eyes' somewhere down the track. As for the negative comments about graphics, I think BF realise that lots of people are going to be using mods to replace pretty much everything anyway so may spend a little more time and effort on other matters. Saying that, Aris is starting to pump out vehicles.