Let's compare this weapons
Bec de Corbin
weapon length: 120
weight: 2.8
difficulty: 15
speed rating: 93
weapon length: 120
thrust damage: 26 pierce
swing damage: 34 pierce
slots: 2
Secondary Mode
Price 10,806
Warhammer
weapon length: 65
weight: 3
difficulty: 15
speed rating: 97
weapon length: 65
thrust damage: 18 pierce
swing damage: 31 blunt
slots: 1
Knockdown
Secondary Mode
Price 9,815
Steel Pick
weapon length: 64
weight: 2.2
difficulty: 12
speed rating: 99
weapon length: 64
thrust damage: 0 pierce
swing damage: 32 pierce
slots: 1
Secondary Mode
Price 8,373
Similarity
All this weapons are almost shortest weapons in their category. (I'm not count useless 0 slot 1handers, and Long Axe is only one shorter than Bec weapon in polearms section)
All this weapons are tincan hunter choice, as long as Pierce\blunt damage is good enough versus armor.
All this weapons can be used on horseback (TBH in both cases it's not best choice for your effectiveness) Still it possible to kill something, and block while you are use your horse.
All this weapons have almost same swing damage (2 points of damage is not big difference)
Both Bec and pick do not have special abilities (crushtrough, knockdown, bonus versus shield, couchable etc...). Warhammer have Knockdown.
Both Bec and Warhammer have 15 str as requirement
Difference
Bec can't be used with shield
Steel pick doesn't have thrust attack
Steel pick can(and must) be used with shield
Steel pick have only 12 str as requirement
Steel pick cost 2,5k gold less, warhammer cost 1k less than Bec
Steel pick and warhammer is much faster weapons (99 ans 97 versus 93)
Steel pick and warhammer are one slot weapons
Steel pick have one of the best damage output for 1H weapons
Warhammer have knockdown
Conclusion
Steel pick is really good weapon. Too good to be honest. You can pair this thingy with fast shield and be awesome without difficulties (autoblock included)
Warahammer at least balanced with cost and 15 str Requirements. Still it's great weapon.
Bec de corbin is only mediocre weapon. Yes, there are some people that can use this weapon with good effectivity, but this people often can kill you with practice dagger too.
Suggestion
I'm not a balance master, but I've got some proposals
1. Give Blunt damage and knockdown to Bec, make 33 blunt as base swing damage for Bec. (two points more than Warhammer)
or
2. Give Bec 33 Blunt damage and Bonus versus Shield, but do not give knockdown.
or
3. Leave Bec as it is, but make it 1 slot weapon. this thingy is not longer than Shortened spear.
Damn, this is a Hammer, HAMMER. not a silly, pink, short as dick pick weapon with pierce damage.
Just look at Bec de Corbin and warhammer. It's sameWarhammer with longer shaft, this weapon must do BLUNT damage. and Knockdown.
Donkey Justice, help us...