Ah, I suppose, maybe. I think... you might be worrying about a non-issue. I am currently reading their license carefully in order to get an idea about, what the authors seem to be okay with. But this particular license honestly feels unusually obtuse to me. I will get back to you and share my opinion about that soon...
But I do want to point out that, in order for the mod to be configurable without error, and to work with the new feature of quality, I just don't think there is any way around increasing complexity by adding scripts to it. I find them more or less essential to the mods proper function. And honestly, the only thing you are truly "copying" are the graphics and sound assets. The rest can be easily recreated through very common patterns and really can't fairly be subjected to a license, in my humble opinion.
I promise to get back to it soon. You should feel comfortable with the mod that you maintain, and I want to respect that.