1. Dragoons have good utility. You have your Limit Break which is the best for Bosses. You are tankier and you can offtank a bit when the Tank dies. And u have 2 stuns and a Dmg buff for Bards and other Dragoons.
2. There are too many Bards. Everyone rerolls a Bard because its so op atm. There will be a point where there will be too many of them and it will be hard to find a grp. Unless SE nerf them.

So if you like Dragoon keep playing it. If not try other classes. But i really wouldnt suggest playing a Bard. Bards will get nerfed for sure. If not there will be a big problem for the game.