I agree a gold trophy is a good idea for two reasons. For one, it will encourage other players to contribute to warlight.
The second reason is Muli would get some recognition for all the hard work. In a way this is a separate issue. Do you agree there should be a good trophy for programming contributions? and then do you agree Muli should get it. But they are very much related in that Muli is the perfect candidate, and serves as a prime example for creating such a gold trophy in the first place. I would also ask people what do you think it should be called? For example, "Trophy: create useful custom content" .. in analogy to the map trophy (see https://www.warlight.net/Profile?p=9014256489