Kitru is right, your concept is pretty balanced when compared to BRD itself but that is because BRD itself is already fairly OP. That's why they get less WD (Weapon Damage) and have their DPS lowered when singing most of their support actions. In the future when level cap is raised this may work due to the continuation of lower WD compared to other DPS jobs and BRD becoming more supportive and less DPSish due to the nature of how its jobs actions will flow.

Positional requirements for ranged attacks is a cool concept but it needs to effect something other than ACC because that is the first thing any DPS stats for which is going to be aimed for 100% ACC on EVERY attack.