I think that Wargs (or at least Scaths) should add to attack bonus.
While a war horse could carry more weight or be faster, Scaths should have an attack bonus (due to the monster helping in the fight)
I like how Horses are -weight while Wargs are + initiative. (I think Wargs give +2 initiative iirc)
This allows for very fast mounted units if lightly armored and riding wargs.
I like how both Scaths and Spiders are -weight AND + initiative. While spiders have the webbed spell it would be good for Scath's to add to the attack.
If wargs also get +attack, it should be less than the Scath bonus. (maybe Warg +1-2, Scath +5?)
I think there should be some penalties to wearing plate-mail.
Currently Tower shields add dodge. This seems strange to me. Plate mail and Tower shields should lower melee dodge ... but a Tower Shield should GREATLY increase ranged dodge. (and possibly ranged defense).
Smaller shields should perhaps have melee dodge, but I don't think this is fitting for a Tower Shield.
Going on to my ideas on armor ... I think there should be penalties to wearing plate. Initiative is only one possible penalty. Other penalties include +10% mana cost fr spells, less dodge, less accuracy, and less movement.
Personally I think plate-mail should lower melee dodge (and not affect ranged dodge other than the tower), and should increase mana cost for spells (which would matter assuming spell casting is fixed and no longer tied to initiative).
The -1 initiative is fine as well ... but should probably be -0.75. And Chain either -0.5 or -0.4 initiative apiece.
Equally I think there should be potential upgrades to leather armor later down the tech tree, sharing the tech with something else ... so that you can still have leather armor at a decent defense, just not nearly as much as legendary plate of course.