Please change Dungeon Finder to remove first boss clear of deserter.
Mass groups dont get the specific item and instantly quit… causing a lot of downtime for people that are trying to go through said instance.
Please put 30 minute on anyone that leaves prior to last boss kill.
Or just remove the timer altogether. I’m not really a fan of the playstyle/community that comes out of RDF personally, but since we have it, I don’t think making it more restrictive is necessarily better.
I haven’t had these groups that leave after 1 boss yet though.
I was in a Throne of Tides and a 4 stack randomly left after the second boss for no apparent reason, guess they were farming for specific items. 
Only had to wait a few minutes though to get replacements as a healer.