They have done an excellent job making the assembly simpler and more producible. So, there is no need to exaggerate this by showing a partially assembled engine without controllers, fluid management, or TVC systems, then comparing it to fully assembled engines that do.
Falcon Heavy Demo | Static Fire,Science & Technology,,On Wednesday, Jan. 24th, 2018 SpaceX completed the first static fire test of the Falcon Heavy launch vehicle. When Falcon Heavy lifts off, it will be the most powerful operational rocket in the world by a factor of two.
Its first stage is