I haven’t read the whole thread, but my take on the PS is that you can’t have the best horde clear and the best anti armour on the same weapon while maintaining a high mobility.
IDGAF about lore accurate personally, this is a tide game for me not a 40k game, but say you want to keep the stats somewhat intact and still nerf it.
Changing the heavy chain to: diagonal, diagonal horizontal, would fix the horde clear and add an element of skill, as players have to learn how to time the strikes to get three in one charge.
Instead of lopping off heads left and right, you’d now have two mediocre attacks and one good, and I know that not everyone is getting three strikes per charge.
Lore accurate since a sharpshooter should not be optimal at melee combat, right?