Yoricks maiden/ghouls need an ai update
Sometimes they bug out and just stand around doing nothing. Its really bad since you rely on them for trading
As for maiden she sometimes completely freezes up and does nothing anymore or just plain suicides into a turret after going aggro a champion, they then walk past their tower and it suicides.
I think maiden should try to stay alive not suicide by running into turrets but rather disengaging from them if she takes a certain amount of damage, she should then rejoin Yorick or follow the next minion wave this will also make her a better split-push threat because right now she really isn't one.
Further more maiden should not only seek to assist Yorick in dueling champions but also in taking epic monsters. Normally when its going full tyler1 it will turn around and help if you enter combat with a champion, it should do the same for drakes/herald/baron
Since so much of Yorick's power is in his passive and ult they should at least have better ai