I’m wondering whether to just come out with it or to just fade.
If you just come out and tell them what your thinking and that you have doubts, that may totally screw up your "fade". I assume that since you have managed to get reinstated, you do not want to do anything to jeopardize that so that you can maintain a relationship with JW family. It is especially dangerous to express doubts about the GB. "Don't you believe that the GB are the arrangement Jehovah is using to direct His Organization?" Answer that wrong and you're outta there again!
Probably best if you continue to play the "MOM IS SICK" card and tell them your schedule is SO BUSY at the moment that you are SO STRESSED OUT. Thank them for their love and concern and promise you'll see them real soon -- just as soon as you are able to get back in person.