(Sorry for my bad English)
With the new update, Hero's Assemble buff had been removed from solo retrying. It means, when you retry running a dungeon without a party, you will no longer receive the buff.
As what I know, the less people you have in party, the more damage buff help you deal. So it is really useful when you have to/want to solo, farming non-stop.
Removing this buff from solo retrying make you have to get out and requeue again and again. This give leechers a lot off advantages, specially when queuing time had been reduced and reward had been increased equal to solo. They just need to buff their ED rate, drop rate, wait a bit to catch an OP who have to get out and requeue.
To me, It is pretty annoy when I can't clear faster, lose my mana pot and leechers get even more reward than before. I'm not rich and not that OP.
I know that this update is to increase interaction between OPers and newbies but I think Reducing queuing time is good enough.