[MegaBlues]

Having too high BW reduces your movement, as well as hit/evade. There's also the fact that magic comes with elemental damage, that mages often have fewer skill slots than their melee counterparts, magic having to deal with Elemental Attack while most melee skills have that bonus tied into Scaled Weapon Attack bonuses, etc.

I think that reducing the BW of tomes would be a good quality of life increase, especially with how accessories and the like now have their own weight.