Not really; the list of traits and their behavior is hardcoded in EoCApp.exe, so you'd have to modify the exe itself, which is problematic for many reasons (not to mention the frequent game patches that'll wipe your exe mods and force you to start decompiling again ... ugh).
The major reason why I joined the forum, bothered with downloading the engine in the first place, and downloading Norbyte's unpak tool was so I could edit and add new traits. Now I find out that the traits are hardcoded?!? That's a really bitter pill to swallow.
There are a few things I believe people have hit that as they sit changes to aren't really possible. I wonder if they support this game long term if some of these hardcoded area's can be rewritten to make them modable in the future. That is something I would be asking for. OR that we have a D:OS 2 and that builds upon the first and opens up more modding options.