1. NC should implement a visualization of players still in loading screen. This would help all but people who pretend to have a slow pc.
2. Do not support afks. Leave parties early so you do not invest too much time. Implementation of point 1 would help extremly!
3. Dungeon design. Good design: trash -> boss -> portal -> trash -> boss -> portal -> trash -> boss (naryu sanctum)
Bad design: all without a portal (yeti, hongsil workshop, starstone mines) and those with too little trash/travel between a portal and a boss (this was a problem way back when lvl 36 and below dungeons were part of daily challenge. Somebody just rushes through the whole dungeon and others get hit by mobs at start/before a portal).