Before we get to the ideology of how picks function vs maces:
Pick internal balance: I believe the progression makes sense. Outside of the pickaxe, they get progressively stronger, shorter, and more dense. A little boring, but I believe that it works out. The fighting pick and military sickle have great secondary modes, but I think they are still a tad weak. Like the military hammer, the fighting pick receives some large penalties for reaching the extremes of the class' length, but I think it could at least have 98 speed.
Mace internal balance: As we see from the iron mace vs winged mace, weight is an important balance quantity that can be traded for better speed/power. Because of this, I believe it's warranted for spathovaklion to have its weight reduced to 1. It will still have 1.5 weight when masterworked and work as a nice balance between the typical mace and pick.
There are also very few downsides when upgrading from iberian mace to the warhammer. This is a similar situation as the military pick to the steel pick, but in this case, the difference in power is greater and the warhammer obtains a stab. I believe warhammer should have its speed reduced by 1. With these two changes, the most powerful, long, heavy, and fastest blunt weapons have some tradeoffs between each other with the iberian mace acting as the middleground.
Maces vs Picks:Right now, picks overlap way too heavily with the maces to be interchangeable. Picks feel like marginally faster maces without knockdown *yawn*. I think the difference between these two weapon groups should be more pronounced. Unlike 2h and polearms, blunt 1hers are balanced weapons.
I believe the pick class weapons should excel against medium to medium armours, but struggle a bit against the extreme light/heavy armours compared to swords and maces. I believe that this can be accomplished by increasing the speed of steel pick and military pick by 1, but decreasing their power by 1 at the same time. This would delegate the status of "powerhouse" among 1hers to maces/hammers for medium-heavy/heavy armour, swords best against light/medium-light armour, axes would remain a jack of all trades, and picks would retain fast and consistent damage. Comparing the steel pick to the warhammer and the military pick to the iberian mace, it makes more sense. -1 damage is similar to loss of half a powerstrike of damage.
Not saying that I expect swords to be bad against heavy armours and the like, but that there are other 1h weapons available that could do a better job vs. that specific target. I also believe this would ease the ridiculous base damage that the picks (+ warhammer) had in the past against 1h swords.
tl;dr:Internally:
Fighting pick +1 speed to 98 cause it's bad all around
Spathovaklion -1 weight to 1.0 to reduce knockdown, weight used as balance factor for iron mace vs winged mace
Warhammer -1 speed to 96, too fast for its power increase/stab upgrade from iberian (using one at +0 I can just dig my held swing in the enemy and it'll go through (hiltslash?) fairly quickly).
So picks = good vs medium/medium-heavy, but be only decent vs very light/heavy gear while maces stay great against heavy armour:
Steel Pick +1 speed to 99, -1 swing damage to 30
Military Pick +1 speed to 99, -1 swing damage to 28
Just wanted to see what people thought about this/refined further if I missed anything since it's not really a straight up buff/nerf.