In the patch notes Funcom claimed to have 'fixed' some of the lag in missions. Well.....
I've done two missions since the patching this morning (Wednesday); one a single player and one in a team.
The team mission still had several 10-15 sec lag periods (a feature inroduced with 14.6). Also we had at least one Mob teleport from one room to the next (first time I've seen this, other than the normal teleporting through walls).
The single player had multiple occurrences of rubberbanding, where I tried to exit a room and ended up back where I came into the room. This rubberbanding is new with this latest collection of improvements this morning.
So not only has Funcom not fixed any lag in team missions, but they introduced player rubberbanding and Mob teleporting.