DKS is an excellent game as is, but just imagine how good it could get with a good modding community behind it.
Could also lift some of the weight off Larians shoulders too ie: someone wants this and the other wants that, no need to bug Larian for it, there's a mod for it.
But, I dont think a fully working game editor like Beths CS or The Geck are easy or quick to put together and exhaustively test.