Bow have quiver and crossbow have nothing....

+1

I'm expecting from Devs to change their mind in 0.5.0 patch and bring off-hand gear for Crossbows. This type of weapon is dying and more more people abandon it for playing mage class that support better and with more DPS weapons.

I think that after GGG adds swords, they should add a node that allows you to use a crossbow in your off-hand, like Guts did in Berserk. That would be enough for me.