Today during the EU peak there were no players at all in about half the gametypes. Approx 25 in FFA, 25 in Cell Vs Rebel, 50 in Hunter, 100 in Crash Site and 200 in TDM. That's 400 in total and dropping.
Assault, Extraction/Capture the Relay, Medley, Developer's Choice and both hardcoe modes were completely empty.
When do we determine when this game is dead? TDM will of course be the final bastion, but I reckon once crash site and hunter drop to 25 or so like the rest, meaning literally just two full lobbies per mode, then we can call time of death.