So put simply, the penances for the various classes are NOT balanced at all. Some are just so much easier to do then others.
For Example let us compare three Malice difficulty Penances.
Psyker’s - Going out with a Bang
Sharpshooter’s - On Overwatch
Preacher’s - Up Close and Personal
Note all three of these unlock the chestpiece for their respective classes.
Going out with a bang - Kill 3 ELITE enemies by exploding yourself on them due to Warp Malfunction (Not the exact text but thats pretty much it lol)
On Overwatch - Take Absolutely 100% No damage of any sort (By this I mean Toughness or Health damage) from melee or it’s an instant fail.
Up Close and Personal - What gun? Only Melee! Entire Mission
I’m no genius but one of these penances seems A LOT easier to do than the others considering the difficulty scale you’re looking at.
2 of them require the luckiest of circumstances to achieve and it isn’t the Zealot’s melee only penance lol.
I got the Psyker explodey one by PURE LUCK (and misuse of peril and deciding F it, I’mma explode on the crowd!) I tried for hours and hours to get it, but either an elite enemy would survive with a smidge of health, or an ally would kill one of the three elites, etc. It was PURE LUCK that I managed to get it. Only 0.4% of players even have this achievement. That should tell you how absolutely bonkers it is to even get it.
I can’t even get close to getting On Overwatch because all it takes is a Mutie or Hound in the crowd or some random poxwalker smacking your toughness bar to make the penance null and void. Can’t even do the exploit of Alt-F4ing at the end of a run and quickly reconnecting to get it.
So far Zealot has some of the easiest penances to get in the game AND they don’t really require luck as a factor in if you can even get them or not. Hell you don’t even really need a coordinated team to knock them out!
You can even look at Psyker’s Heresy Penances and see more of a difference in the ridiculousness of difficulty difference in penances. Do 90% of a Monstrosity’s health in damage BY YOURSELF with only BRAIN BLAST.
Compare that to, say… idk Sharpshooter’s Make Every Shot Count, or Preacher’s Just a Flesh Wound, both of which can be done WITHOUT a coordinated team and offer the same rewards at the same difficulty level of mission.
Penances need a rebalance in terms of how they compare to other penances of the other classes in the same tier.
For Example, On Overwatch for Sharpshooter can be changed to just not taking health damage from Melee, so that way you have your toughness as a shield and can play around that and it isn’t just based on luck if some poxwalker just grazes your toughness bar without actually hurting you. Psyker’s going out with a bang can be changed to either just damage 3 elites with it (Similar to how the Sharpshooter’s grenade penance was changed) or kill 10-20 more enemies with the explosion.