I will admit it is somewhat strange that TROS creates the implication that the reason Finn betrayed the First Order was because of his Force-sensitivity awakening, and yet at the same time he meets a bunch of former First Order troopers who clearly are NOT Force-sensitive.
I don’t think that Finn would want to tell her about his Force-sensitivity only as his last words, and I definitely do NOT what to create the implication that Finn is in love with her. As a result, I find a hard time justifying keeping in him trying to tell her something.
I’m not entirely sure what I want to do with him yet, but it will likely have something to do with a Stormtrooper rebellion ALA Duel of the Fates.