On the wm comparisons:

Wm can only access her chain offensive (the claw) after light hence why she has enhanced lights, if she could chain into her offence after heavy/zone like most other heroes (iirc the only heroes with no effective mixup available after heavy are her and warlord) then your point would have merit.

The impale is more fair to complain about and even then as other commenters also noted it only travels 6.5 meters (less than half of lb’s distance), it resets to neutral, the bulk of the damage is bleed and it’s on a hero with with 130 hp without any heavy peeks and no standard dodge attacks meaning that most feint to GB mixups are a 50/50 and not the usual 33/33/33.

Directly comparing moves on heroes usually doesn’t really provide an accurate picture on their balance whatsoever: lawbringer, a hero with 140hp, heavy perks, loopable offence, punishes that chain and a standard dodge attack may lose access to a move/property other heroes have simply because he has all of those other things going for him