Seems to me, due to tactical movement requirement, warrior more interesting then ranger. Maybe, developers can force rangers to make multiple jumps over battlefield with bow? =)
May be It will be interesting to make arrow damage depending on target distance (e.g. 1/3*damage for 15 metres, 2/3*damage for 10 etc, full damage on 5 metres etc). But in melee combat bow should to be very unconvenient weapon. Poor archers never get rest =)
Of course arrows rebalance will be necessary.
Well, the AP requirement for using a bow (just a normal attack) is 4, which is on the high side when compared to most weapons. It really doesn't leave an archer-type character with a lot of spare action points to remain mobile. Not without heavily investing in Speed (on top of the required Dexterity), at least. At early levels they can only get off three bow shots every two turns, and that's only if they do nothing else but stand still and fire. Much of the time they already do need to move just to line up a clear shot on the intended target.