Idk, there are alot of different maps for DH with a wide range of visual quality and athmosphere. Battle of Foy, Hill 400 or Stavelot for example have a very unique feel. On the other hand you have community created maps wich are far away from that and wich names I can't even remember.
I think TW will turn out a lot more polished on the visual side. Not only because of the new engine but also of the talent and dedication that flows into this game. I am not saying that the DH devs did a bad job - I love this mod - but times are changing. Even those guys try to reach a new level. Just take a look at their latest media releases. Will be interesting to compare TW and FE as they are developed on the same engine and for the same time of events - mainly Operation Overlord. What I am excited about the most is how they design the gameplay for their games.
Good times are comming ...
Btw: my question was not answered. Will there be deployable MG's and changable barrels for the MG42? Deployed MG's are possible but I am not sure about barrel changes.