I checked, the answer is yes, RSRDC does overwrite some campaign layers for 1.70. But that should be fixed with official releases and I haven't seen any difference anyway.
Maybe I've never noticed it but is there a new early war sub texture? I don't like this one as much as the stock game, this is too gray...and SHINY. I liked it when it was rusty and weather beaten
Guess I can always get skinpacks.
Other than that, beta is running fine with me.