OK, look here folks. PAY ATTENTION to kotor 2, Nihilus, Kreia, & Sion were all born of malachor 5, which happened at the close of the mandalorian wars approx 4 years before kotor 1, Ten years after that we see the Exile come into play. Now we know that the Exile served under Revan in the man/wars & was tried after that. That means that Nihilus destroyed Visas' planet somtime after the close of the man/wars, 14 years is the time frame we're lookin at. Visas tells you in the game after she looks at his face that he was "just a man". Now I've played through several, times switching between light & dark, female & male characters but she always describes him as "just a man" my thought is that if it were somthing in direct connection to the Exile the answer would change, but hey, prove me wrong..... it's how we learn things
Well one thing of that post is wrong, Kreia wasn't born at Malachor V otherwise she would not have trained Revan. Sion wasn't born there either, he may have had his body destroyed there
Also note that everybody sees destruction in the Exile the same thing they see in Nihilus. When Nihilus is defeated he wasn't destroying anymore he was dead. Something that he could not have been before, he was nothing special anymore. A few seconds later Nihilus actually disappears into the force something that no Dark side of the force follower has ever done. Nihilus is a strange thing, what you can conclude out of all of that is however, that Nihilus isn't special anymore.
The Exile gets his connection to the force back when Nihilus dies, he is nothing special anymore, he is just a man. Like Nihilus his other half became just a man. Then Nihilus disappears into the force, the Exile is whole again nothing special just a man.