BGs were especially laggy on PC EU a bit earlier, and that was the case for everyone in the group.

Laggy enough that I sometimes see people flying (literally) and some group mates told me they could see me dead sliding on the floor (while recently respawned). Seems there are quite a few issues since Dragon Bones, including but not limited to: very long loading screen to get inside the BG, chaos ball bugging out with multiple people picking it up (possibly linked to desync issues) and then dealing no damage to the carrier, as well as random latency spikes and sometimes seeing multiple characters flying in the air before everyone you see flying gets disconnected.

Quite messy.