In general, I don't see any reason to change either the RJ or the BJ. Malifaux is a game of chance/luck and cheating your luck. The jokers just represent the "little miracles" that occur with mundane activities/combat. A lucky headshot, random bullet stopped by something in your pocket or similar moments that we all love in the movies.
This isn't supposed to be a 100% skill based game, the luck and randomness is a factor to be remembered and respected when conducting tactics. There are plenty of "critical hit/miss" items in other games that no seems to be complaining about, and in most dice based games it is more likely to occur and multiple times in a turn too. Where in Malifaux it happens once in a turn usually at most.
HTW isnt really that evil of an ability once you start playing around it, so you wont be able to cheat your damage as much, but against most Res models you are almost always hitting them. It takes more hits to kill a model but they are getting hit more often.