Logic editor is not complicated, you get the same instructions they use for making their own modes like conquest give each command a bland little box and let people drag and drop, its a 1 for 1 icon = "if" statement.
It would have taken like 2 guys...a programmer and a UI guy to make it, and a graphical artist to touch up the assets which would have been a brief job maybe a couple of weeks.
In terms of difficulty it would have been:
AoW 97%
Portal 2.5%
hazard zone 0.5%
or something to that effect
Lastly the video(which we're talking about remember) doesn't show any new assets as i said, only the reimported portal assets.