List of direkt and indirekt nerfs:
Damage reduced (more than 2 years ago, shortly after the model was changed, cannot remember the old values, but I think it was a lot higher)
Change of the armor/soak values (~2 years ago, biggest nerf in my opinion, as it made group fights pretty much impossible -stun-)
Nerf of loomed armors (less bouncing -> more stun, being stunned = dead with long maul)
Removal of polearm stun (not sure, if long maul actually got polestun, but I can remember that it was possible to hit a shielder twice with an overhead)
Turn rate nerf (can't think of any weapon, which got hurt more than long maul by this - to hit something when the enemy got space to dodge, depends on nothing but luck)
Crushthrough nerf (worst for me is that it made chamberblocks useless..)
List of direkt and indirekt buffs:
Crushthrough damage buff (too bad overheads suck so hard, that you barely use them)
did I miss something? also QQ and eh QQ, but I really don't care anymore, since I got my long hafted spiked mace of knockdown.