With Choxorn I feel that much of what he has done would be convenient for a saboteur. First, he did indeed get injured after sneaking around on night 4, and it can be seen on morning 5 and morning 6 that there seemed to be very few saboteur actions those nights. I think this is because Choxorn was injured. His ability itself is also convenient for a Saboteur to claim. So he can get into any room he wants, but he can't repair it without a key? That sounds to me like "I need reasons to not have to repair things at night." I think this is a big point that we need to focus on a bit more. Many people have repaired things over various nights partly because they were ordered to by others. I think the saboteurs would have been trying pretty hard to make it so others wouldn't expect them to be able to repair. As long as they are expected to repair things, they probably feel like they have to keep their covers from being blown. Obviously however they'd rather not even be in that situation.
Another thing is that he voted for the short path with its mines, which is another convenient thing for the saboteurs. Also now today he claims to have given his repairing item away, which I believe is an attempt to free up his nights for saboteur acts.