The EU probably has mixed feelings. 1) Happy on one side for a ceasefire.
If you don't have skin in the game, you can't be effective. As the Turkish saying goes, "the field (military) feeds the table (diomacy), the table feeds the field"
1) Hafter's bombing of the military academy in Tripoli didn't sit well with the int'l community and more importantly many Libyans. Among the dead were cadets that belong to eastern tribes as I've been told by my Libyan friends.