Thanks, iam glad you like the new sounds and particles. But what is wrong with the "graphics"? Everything got a huge improvment - textures, some models etc.
I wouldnt recommend that. The sound engine got a little overhaul in 2.4 and we added/modified some commands and sound events which would produce some terrible (sound) bugs.
Well, the graphics from the 2.3.1 (windows) are more detailed. The trees, the buildings... in the 2.4-dev that i played, maybe is for linux version, but the windows version have more detailed graphics. Not is wrong as you say, it´s only that 2.4-dev have some things, as terrain and buldings that appear more "paintbrushed" jejeje. Another thing, is the base management. I prefer the icons of the 2.3.1 for the installations. They are more detailed and the rough terrain is less darker.
More than that, excellent work!