We discussed about that in the steam forums a while back.
But from my perspective the weapon speed still does not have an influence OR it has an unintended impact on the game:
Observation 1:
Weapon Speed does not have any impact on when your next turn is. A mage with a 8s weapon (dagger) will have his next turn in 10 seconds same as a mage with a 10s weapon (pole).
Observation 2:
Casts do not adjust when the next turn will be. With exceptions of special actions.
If Observation 1 is working as intended: This would mean that slower weapons would almost always be better than faster weapons, because they probably do more damage.
If Observation 1 is not working as intended but Observation 2 is working as intended: This would mean that you should equip your mages with daggers to be able to cast faster.
I think these things can have a big impact on the game and group composition. It would be great if you can take another look on what influence weapon speed actually has in the formulars.
How to test in game
-Create 2 Female mages with different portraits, equipped with dagger
-Create 3 Male mages with different portraits, equipped with polearms
-Position the both dagger wielder to the front together with gaulen and the 3 pole wielder to the back
-Engage in first combat
->The female (dagger wielder) and male (pole wielder) will have an attack speed of 10s each.
In my testings the pole wielder's 10s was even rounded down to 9s while the dagger wielder's 10s were always 10s.