BioWare tweeted a small video showing SWTOR weapons with new visual effects. This aparently a new feature comming with Eternal Championship starting on Sep 7. Hopefully more info will be available soon.
Earn VFX weapon rewards for your weekly Eternal Championship triumphs, starting 9/7! Step into the ring for yours! pic.twitter.com/wdpItNuBRT
— The Old Republic (@SWTOR) August 22, 2016