Holy shit guys:
"That really helped us in thinking about Rey and Kylo Ren, which is to say that we wanted to elaborate on the idea that Snoke bridged their minds in ‘The Last Jedi.’ But what we wanted to say is that there’s something deeper there, and leave it to debate about at which point they became this dyad in the Force, where they were really two, or were they one, whether that was a mistake that Palpatine made by bridging them and therefore creating this thing. But regardless, their relationship is extremely interesting and complicated, and it was one of the things that J.J. and I loved about ‘The Last Jedi’ that we luckily inherited and could build.”
Straight from the horse’s mouth (Chris Terrio).
Seems I was right that the ‘mind brigde’ and the ‘dyad’ are supposed to be two different things, but more importatly, seems we were right that not even they had any idea what they were trying to do, leaving all major plot points up “to debate” lol.
Also sherlockpotter’s clip sounds pretty seamless to me too.