The Corpse Despanw bug causing lag is being addressed by Bioware
Right now they are performing a short restart, no downtime (unless something goes wrong, heh)
► Server Restart | 11.23.2015, 09:10 AM
We will be performing a brief server restart to help address some of the latency issues associated with corpses not despawning. The entire restart will take approximately 30 minutes. We will be performing this restart shortly.
The developers are fully aware of the issue with corpses not despawning, which creates crazy lag in some areas for many players.
► Corpse Despawn and Lag | 11.22.2015, 02:23 PM
We are aware of the issue currently in-game in which corpses aren’t despawning, leading to lag issues in some areas. We are exploring a fix for the issue for Tuesday. Also, we may be doing a brief server restart tomorrow at some point to help alleviate some of the lag. I will have more information on that tomorrow.
Thank you everyone for your patience.