I see why this would be a nerf to your current build Erasmas but with a dedicated xbow build you can really make something decent still. Like said above horse xbowman is still an option, otherwise something like this is pretty nice when you look at the build. If you want to be different you could spec 2h and use the Langes Messier which *may* only take up one slot still.
* Strength: 15
* Agility: 24
* Hit points: 54
* Converted: 8
* Ironflesh: 2
* Power Strike: 5
* Athletics: 8
* Weapon Master: 8
* One Handed: 137
* Crossbow: 130
Speed to get to where you want to go, solid long range damage and accuracy, and the wpf proficiency to effectively use a 1h weapon without a shield when its needed.
Looks pretty solid to me to be honest, in order to get the shield you would lose out on 1h prof, speed, and range damage.