I had a hard time trying to get into the preview server too ( same crash from when mod 7 released)...i used the command line d3d11Enable 0.. and was able to access the preview server.
+ to this. I'd also like to see more rewards for actually playing the game, like tier 2 dungeons' bosses dropping GMOPs(instead of peridots) and artifacts( waters, lantern and catalogue). Pretty sure this will encourage people who ACTUALLY wanna play the game to do the tier 2s.