Party leader left...
Enter dungeon → Invite people
???
Problem solved
How does your example solve this general problem? In a group of 5 people 4 of them depend on the whim and patience of the one player that started the group. That person leaves the group for whatever reason, the other 4 people are screwed out of their progress in the dungeon.
That’s an issue, always has been. It might be discussed more for this week because the LS deals with a dungeon, but it isnt new.
The game should simply give the group leader status to another person in the group so the party can seek a replacement for the leaver and carry on if they want to.
I think eekzie is saying that you should start the group, as you (hopefully) won’t be the kind of person you are here complaining about. Thus, if you start the group, and you know you will stick it out to the end, you will never have to worry about the whim of someone else.
To respond to your overall comment directly, though, I completely agree that party leader leaving should not kick everyone. Whoever came up with that system is dumb. It should auto-promote someone else to leader, so many other MMOs do it that way for a reason, it’s the most logical and least frustrating of any other option.
But what eekzie suggested would solve your problem on a personal level.
It’s a medical condition, they say its terminal….