About the leaving duty thing, I realize this source is on the level of dude trust me but I would still like to bring up this:
from this tweet https://twitter.com/bxakid/status/1453311803694403594I've just talked with the French CM that confirmed it's related to intentionaly disconecting and that leaving the duty will not get u punished as u already get a 30min TO.
It seems reasonable to me that the TOS go after people who DC, wait until the party vote kicks them and then open up the game again to queue up without penalty. Leaving the duty ingame already has a punishment to it.