It seems like the core issue for this guy mostly Castrum, and we kind of know the answer there that it's mostly a matter of reward as well as length. People don't want castrum when it could've been prae and that's a wasted half an hour and less exp. A six hour penalty is totally too harsh and again, people genuinely do need to leave sometimes. Though they'll prolly be messing with msq roullette anyway come 6.1 and this'll be a nonissue, the fix for players leaving castrum is to make the EXP reward more worth their time, honestly.
The thirty minute penalty works for dungeons and such imo because it's rare a dungeon will take more than 20 minutes, so people choosing to eat the penalty probably have legitimate reason to do so. Personally I'll stick to whatever I get unless something genuinely came up mid dungeon, especially if there's someone new. I once entered an in progress 90 trial where there were only 4 people because the rest left after one wipe - kind of rude of them to leave, they ended up with vote abandon passing and going to try again after. At most I'd argue absolving the penalty after one man eats it could be changed into everyone having to go through the thirty minutes, but six hours is ridiculous
