Here recently, merc has been getting buff after buff to compensate for her inability to get a new contract. However, due to everything she has received, if she is contracted to a cult or unseen member, it heavily tips the balance into they favor, and not on a healthy way.
The main guard ability for merc has always been rough for investigators as there is no way around it. The bd buff is suppose to be that it prevents death and conversion. However the secondary ability is mostly scum positive as it kills off anyone visiting your target, which is still very likely to be bd.
The other new ability merc got is that he can auto pardon his contact. This completely nerfs bds main form of killing scum by removing the possibility. Add in if the merc claim isn’t know, it can seem like the king is saving them.
And probably the biggest problem is the merc is a +1 to unseen and cult, which lacks the ambiguity of evil/good king, and still forces bd to waste two days to kill them. Meanwhile whoever the merc was contacted to gets any extra night, which can mean a new conversion, more death, or both.