I''m going to try to put this as best I can. I apologize for any offense this may cause.
If I were the hospital I'd be praying for an order to move poor Archie to hospice with legal 'advised consent' about the dangers signed by his parents absolving the hospital, transit team, and the hospice of any liability.
At this point, Archie would feel nothing and know nothing if he was moved. His physical body would be treated with respect and gentleness in preparing for and during transport. If it should happen that his poor body does not survive the journey, his body will finally be at peace. His mind/soul/spirit has been at peace for months now.
As far as allowing him a 'dignified death' that ship has rather sailed, hasn't it? He hasn't been 'sentient' (as in knowing and/or feeling what is going on) since the terrible event that has resulted in this tragedy. He is, in essence, a 'shell'. Any 'dignity' in his treatment now is for his parents, not for Archie. But Archie's parents are the ones demanding his transfer, so they must feel (rightly or wrongly) that there would be no 'indignity' in the medical actions that would or could result from that transfer, nor in the transfer itself.
We had my dad disconnected from life support (once he could breathe unassisted) and moved home, where he died 6 weeks later. There was no 'indignity' in the way he was 'handled' (I can't think of another word) by the hospital staff nor by the transit team. He was treated with professionalism and compassion (as were we) from the time we said we wanted him home until the time the transit team put him in a hospital bed in the family home.