On most siege maps it's doubtful if you need to have both a 2-slot bow and two quivers of arrows anyway; you'll generally be killed and respawn again (with all your ammo) before you actually use them all up. The real reason you feel helpless fighting in melee as an archer is your lack of PS means that all your attacks glance, if you manage to make any.
As to shielders, I don't want to see them buffed any more than they already have been. The pre-upkeep days of battle servers belonging to two handed hero tin cans are long gone.