There isn't enough content of VP so I'll make it myself.
I think we deserved more of Laurence trying to come to terms with the idea that he was in a new realm. Yeah, he had been to and stuck in the nether before so he would accept it faster, but MMW/VP's world is so much different than both the Nether and the Overworld (which I will use to address MCD's realm in this post).
VP's world is more technologically advanced and science based than either of the former, and for some reason, Laurence was just fine seeing a computer for the first time. Like a microscope? I could understand, maybe the Overworld had less advanced versions of those, but a fucking COMPUTER?? No way he would be normal about that, cause again, THEY DO NOT HAVE CRAYONS IN MCD, LAURENCE DOES NOT KNOW WHAT CRAYONS ARE.
Also, what if because they are from different realms, Laurence's body/innards are different from what Polly and Laila are expecting when x-raying him and inspecting him? It's been fanon established that the people of Phoenix Drop would have heftier builds because wheat and meats are their main diet, so Laila and Polly would def note how his diet makes his body, which would make Laurence very astonished since they 100% have not reached that level of health research in the Overworld. Maybe his bones are tougher than what Polly and Laila are expecting, maybe he has extra or less ribs than 'normal'. Hell maybe even his heart is on the opposite side than they are expecting because he is a 'human' from ANOTHER DIMESNION.
Yes, they have encountered people from other dimensions before, but Laurence is arguably the most 'human' they have ever seen. Modzilla is...well for one a dimension hopper and a man charred by the void, Reese and Marsh are literal sentient candy humanoids, so arguably, Laurence is the closest to human they could get.
Maybe him being a shadow knight means his body on the inside exhibits sign of decay, something or anything that could make him seem dead. His skin being ice cold, maybe he lets them see his shadow knight form for scientific research.
While yes there was a plot they had to be following, there is so much we missed out on of them just addressing that Laurence is not where he's meant to be. He just woke up in this new dimension after by his account being hit over the head by someone so incredibly close to him (Garroth), and it is just breezed over. It's just a lil upsetting.
ALSO, the lack of other MMW characters returning is sad, I think it would have been funny if Laurence had to learn there is an entire dimension full of people made of candy.