I don't know what the quality is like but there are some mods out and more in the works.

Some are working on new campaigns for NTW but I have heard nothing of full conversions for that title.

The community is working on tools, but at what stage they are, I can't say.

Serious mods take time and the game has only been out a little over a month.

In a year there may be some great ones out but right now is mostly individual efforts.