A DH update is going to happen, eventually. Firebrand can play a few different support roles in PvP, WvW, and raids/fractals. Core Guardian is slowly being tweaked. Dragonhunter is falling behind all other specializations which is why the patch after Tuesday, I hope DH will be a focus.
What would you want DH to look like?
My most basic request would to make bow 3 have knock back standard.
A more out there request would be to change bow 5 to cripple, and not trap.
Overall, I would love to see DH be more about using traps, longbow, and traits to provide control options like cripple, slow, daze, knockbacks, and pulls.