I think the first question there would be really helpful now they're not going to be a trial for EG. Not just the date but the context, was Lucas actually on screen and chatting or was he in bed asleep and EG just pointed the camera at the bed for JH to whisper "goodnight, bubba".
The second is trickier to ask, but it would be very interesting to know if it could be asked carefully. We don't know if JH took Lucas aside and asked him about these injuries without EG being around. We don't know how he might have asked, whether it was an open question of "how did this happen?" or whether JH just took EG's word for all the injuries and never really asked Lucas. And if he asked Lucas about EG's treatment of him when all these abuse allegations were made and CPS came around to question them, did JH ask Lucas privately and assure he wouldn't get into trouble for the true answer, or was it more "EG's okay with you isn't she?" ... while EG was in the next room and maybe not enough sense of safety for Lucas to open up.
I don't know if that second question is so much about what happened to Lucas or just satisfying our curiosity, though. We have the words of relatives, we have the CPS report, we know it happened. JH would have options for answers, truth or lie, surface truth, deep truth, or lie. If he says he was clueless he gets castigated and accused of lying. If he says deep down he wasn't really sure, he gets castigated and possibly put on trial for neglect and endangerment. If he lies and says he knew nothing, we don't really learn anything from the lie.
The first question could also potentially be answered with a lie...but that goes to the case of Lucas' death, which is the thing we have the biggest questions over. We know Lucas was abused by EG, we don't know exactly the circumstances of Lucas' death, so it's information on the latter that I find more intriguing.
So if we had a wishlist of questions for NG to ask JH, things relating to the possible COD and timetable, things JH can answer without needing to share what he's been told by LE, what would be on that list?
When did JH last see/communicate with Lucas, and what were the circumstances?
Did JH go to the doctor's appointment with Lucas over the vomiting?
What did the doctor say about a possible reason for the vomiting?
Was there a follow-up appointment when the zofran didn't seem to be helping?