Queue, party, go
The oldest tax in Lineage 2 is the hour you spend assembling a party before the fun starts. We abolished it: queue for the dungeon, and the dungeon builds the party.
The queue is the door
Queue solo and the system builds the group around you. When the party stands, the run starts. No shouting in town, no spreadsheet of contacts, no "LF healer" for the third hour: the dungeon does its own recruiting.
Brought your own? Walk in
Matchmaking is the safety net, not a toll. A premade party of two or more enters directly, no queue, the leader opens the door and the run is yours. Play with strangers when you want strangers, with friends when you have them.
What runs on it
One matchmaking backbone carries the whole category: the Sepulchers, every wing of the Dream Dungeon, and the Dwelling of Spirits. Hard-mode dungeons are the exception in the other direction: premade parties only, no queue, because those runs are for groups who mean it.
Your run survives your internet
Disconnected mid-run? Log back in and step through the door into your party's instance, right where the fight is. The gate is strict on purpose: it readmits members of that run's party and nobody else, so recovery can never become a backdoor.