If I remember correctly, this feature was originally removed with the 2nd WiltOS update when doing a performance check. Having weapons/sabers appear on your character added more moving parts to each player and could increase temporary entities lag. With the correct know-how and implementation it might be possible to bring it back with less of a performance hit. We'd also have to look into ensuring they wouldn't appear when /cloak or the cloaking device is used, which I'm not sure is possible but it might be.
Edit: We're looking into potentially doing a pretty big WiltOS overhaul. When this happens we'll look into how possible it is to do this again if time allows it