The main controversy seems to be in what a "Repair Hulk" is and if a "Repair Hub" is the same thing or if they are two completely different objects and objectives. Seems people are convinced that killing the wrong thing fails the mission for every body.
Currently the popular theory for completing this mission is that this mission is actually a race against the Klingon players (that may or may not appear) on the map.
Another theory is that to get credit for the mission you have to score in the top X percentile during the match. I'm hoping this is not accurate because that will make this a very un-fun repeat after repeat just to clear one mission that you may actually have to repeat as many as 15 time (coming for one source on the STO forum, read into that what you will.
If any body has the answer or other theories, please share so this pain in the ass of a mission can be something that can be achieved and finally cleared off all of our mission logs.