i noticed that the mod has a lot of music but it only plays on deathmatches so i have two sugestions:1 make it so the music plays by default on singleplayer and 2 take those deathmatch levels and make them into a campaign at some point in the future .

the  deathmatch is sort of a campaign at this point (unfortunately only on zandronum) you can play wth bots and get 1st to get to the next level, more will be added

Personally, I think the FurDoom OST would not fit the Original Doom 1 and 2 Mapsets. 

Idea 2 sounds interesting, but I would rather see brand new maps and ideas. Usually, it is the other way around anyways. The DM maps being based off of the Mapset.