Reduce the jumps to 30 second intervals: ie. Jump 30 sec, Spineshatter Dive 60 sec (fine as is), Dragonfire Dive 90 sec, Elusive Jump 60 sec.

A good drg is able to use these jumps to get from mob A to B in a flash and more time spent on a mob is more time for dps. With the lower gcd on these skills we have more tools to get from one mob to the next without having to walk. If shoulder tackle is on a 30 sec gcd (with stun!) why cant jump be on a 30 sec gcd?

I actually like the positionals despite it being annoying to land at times, but it shows how much skill is required to land HT on a moving target. Also SE if you can fix the HT buff so that you get it at the START of the attack animation instead of the end that would help.