So far nothing is being done. Lost connection in a dungeon 3 times today and every time i had a 3000 ppl+ queue. If this continues I'll just have to stop playing until SE fixes their stuff.
They could at least let you back in a duty if you have been kicked from the server while in a duty.
So today i spend over 10 hours in queue what a great experience this expansion has been so far.
They should stop calling it a early access and start calling it for what it is. A server stress test!