Hi Niall,
Haven't used a VM since I set everything up over a year ago to be honest as I've always been able to tweak the image slightly every time I've needed to add something to the task sequence. These are machines that have always worked, so I just went to run the task sequence again. I can't even deploy the existing task sequences that I've been using since last year.
Other than installing 1902, the latest ADK, PE and running Update Distribution Points on the Boot 64 image I haven't changed a thing. Ulitmately what I'm trying to do is push out Windows 10 1903. Up until this update I was installing 1803 without issue. I'll put a VM together now to test it out though.