I chose BRD for swift gameplay, if I wanted to cast I would have chosen a Mage.

[Felis]

I think OP's problem is that Bard don't get a own timer bar called aiming bar.

A aiming bar can be like a casting bar, but with the difference that the Bard can still shoot before the aiming bar reach 100% at the cost of lower damage bonus. Of course, moving would reset the aiming bar because it would break the aiming process.
That would make it more like in FF Tactics.

Or OP complain that sniping don't feel like just shooting.