You can't really judge this change til you see how it effects the overall gameplay. From a realistic point of view you say yes one should need to stock up on arrows in order to use a bow. From a game point of view however you have to think that this is the only class that does that atm, so perhaps it should act in the same manner as other classes rather then use ammo just because it's an archer.

One could argue, well why not have arrows with different effects? Well the issue you run with this is that you cause a great strain to inv space for anyone who wants to play ARC. Sure you can say, I have normal arrows, 5 enfeeble arrows and arrows that lower recast time, 2 stacks of each and that's 14/100 inv used just for arrows, while other classes don't need to do any of this currently.

Time will tell how this will effect things though, one thing I imagine however is an ARC dmg output may be lowered since they themselves may be considered a melee class with safety in terms of how much danger they put themselves into. compared to other melee which fight from the front line and are most susceptible to the monster's abilities.