I've got a slightly different idea about the exile, vs. what has been discussed here and in other threads I think. But it hinges upon 1 assumption- For those of you who were able to train the others as Jedi, how high of a level with them did you get? Did you manage to start them earlier on (say you were level 20 or earlier, so by the end of the game they're level 10 or so?)?
The most important fact I need to bolster my hypothesis... . has anyone "force chained" with the other Jedi in your party?
It is clear that the exile has a bond with Kreia but unless we see that force chain with the other Jedi, the "bond" that they share with the exile strikes me as being significantly different from the bond between student/teacher or even the bonds being discussed through the force that the council feared. (And even if the Exile did force chain with the newer Jedi, why would that bond be this "abnormal" one instead of a bond formed between student and master?) And IMO this means that the issue with the exile, the "wound" is something different. I don't think it's about his bonding & "feeding" off of other people's force powers. It was about his turning off those connections to the Force. His destiny was to follow Revan and Malak like the other Jedi. He turned away from that path. He demonstrated that you can cut yourself off in the force, refusing to have it dominate your destiny. The Jedi Council sees this act as a wound (and as a threat to their teachings and belief system, which is already flawed in some way) and decides to punish you, lest you lead others down this dangerous path.
The exile is charismatic, like Revan was. But this charisma that draws people to follow either the Exile or Revan isn't force driven IMO or remotely like Nihilus' feeding. Many non-force sensitive people chose Darth Revan (Saul Karath and the other ex-Republic military) when Revan returned to conquer the Republic, just as those non-force sensitive people willingly followed the Exile's order to charge into the mine field at Malachor V for "force bonds" to be a factor.
One other thing. Malachor V corrupted Malak and Revan but it did not turn them to the dark side. On Dantooine, we have this from the vision on Dantooine:
Malak:
"The dark side is strong in this place - I can feel its power. Is this wise? The Ancient Jedi sealed this Archway. If we pass beyond this door, we can never go back. The order will surely banish us. Are the secrets of the Star Forge so valuable? Can its power truly be worth the risk?"
(oddly enough, Revan is wearing the Darth Revan robes supposedly created by the SF and a mask, and Revan appears to walk like a woman)
If they had already "fallen" (or at least Malak) to the Dark Side, there would be no concern about being banished by the Council, or of "going back" or any risks. And it seems to me that this occurred before the Exile returned to the Council (only to be banished).