Last night, I decided to try some archery with no crosshair for a second time. My first time was a while ago, and that was back when I had gotten the game; I didn't like having no crosshair, so I switched back...until last night. I gave it another go, and holy crap it's amazing. I practiced on some animals and stationary human targets and kinda got the hang of it.
I got ambushed by some cultists, and managed to take them down with only just a few (perhaps two to four) of my shots missing, which is pretty good IMO considering I had just turned off the crosshair maybe ten minutes beforehand. I then got up to the Forsworn camp at Dead Crone Rock. I managed to snipe them in just one or two shots. I checked the bodies and noticed I domed a few of them. Man, it's freaking great. The only thing I'm worried about now is trying to get accustomed to the crossbow without a crosshair.