Dragoon is absolutely fine on keyboard. If people are using the default setup it's the easiest job to bind for that, and the default setup is horrible.

The only problem DRG has atm is it's not really good to break up your combos. I'd like to see a single GCD Finisher that can be used at any point after your 1-2-3 combos, immediately after Heavy Thrust, or after Wheeling Thrust/Fang And Claw, and WT/F&C would both buff its potency the more you used them. The idea being you could trade your extended combo for this finisher depending on the fight, and tailor its usage based on your skill speed preferences.