I've noticed this too. I ran Sunken Temple of Qarn a good dozen times as my WAR. EVERY run i did had a whole bunch of GLD/PLD gear drop and the only thing I got out of it was once I got the Bardache at the end of the dungeon. Was I missing something out of that dungeon? Do certain chests always drop the same gear? I really feels like it.

I think It would be nice if they made it so the drops would lean towards the classes/jobs that are doing that dungeon at that level. If a group of people over the level cap start doing it, then it can be more random as they might want to gear up a lower class.