Okay. Here.
Premise: there's no point in addressing the symptoms because gamers game. They'll always find a way around any rules you make, no matter how draconian and complex. You have to address the root. The root is, the loot is worth more than the ticket.
Solution 1: don't change a thing about ghosts/mules/token lending. Have two sets of treasure. When you leave the dungeon, each player draws three from the base box. It contains a mix just like today. They get chips for the bonus TE loot, which they draw from boxes in the lobby.
The base boxes have about three chips per ticket sold. Add a little more in case of spillage, but not many.
Then you can raise the loot cap as high as you want. Make it 20, 50, 1000 for all I care. Just adjust the loot mix in the TE boxes to compensate for the higher cap, with more uncommons and fewer UR/relics/trophies. Just make it so the expected value of the loot isn't a lot higher than the ticket price.
Doesn't penalize new players, doesn't ban ghosting or farming or mules. You can even allow farming at GHC with its lower ticket price by watering down the TE boxes enough, but you don't have a massive incentive for people to scoop up every unsold ticket either.
I'm some sure some people will find a dozen reasons to hate it, but if you're honest it doesn't totally suck, either.
Edit: I'm sorry, I have a lot of anger in general this month. And yes, this topic frustrates me, especially when some people act like there was no warning
"Ceci n'est pas une pipe" - Magritte