Seeing BR's ingame grab of Kira on viewscreen using stock game background has made me think it might also be possible to adapt the SPMod upgraded viewscreen dialogue sets/scenes to work in DS9FX as well (we wouldn't need to change characters). If works, should make any viewscreen interactions/backgrounds more canon and immersive.
It will involve some changes to Sets folder and some scripts, but shouldn't be huge issue in theory. Just depends if worth the effort
Here's some examples of changed backgrounds from SPMod as reminder: