But don't forget the ubiquitous twin strike. The +3 damage bonus damage applies twice. This is a great bump for a double attacking at-will that doesn't get stat bonus to damage.I think your average "+2" damage will quickly disappear whenever you're using a power that allows for multiple [W]'s damage. Which is somewhat of a shame, in 4e's framework there is absolutely no reason a crossbow archer should be less viable than a bow ranger.
So the bow ranger is shooting for d10/d10. The crossbow ranger is shooting for d8+3/d8+3.
Sounds pretty good to me.
BTW, is a halfling ranger inherently gimped for having to use a shortbow? Because it's pretty much identical to the crossbow in almost every way (damage and range being the important points here).