I can confirm Em4 had a lot of problems with mods stealing, problem of Rights, etc. Espcially, as 11john11 said, with models (And with scripts too).
As an exemple in my country (France), we had a lot of mods scheduled, but only 10% of them are "finished". We had so many problems between each developpement's team...
Today, there is only 2 french mod still in development. A few others are finished but with a lot of bugs, features missing...