I think the 8 speed is still a work in progress, in that I find the transmission much better behaved used the Power ECT mode all the time. I shouldn't have to do that to keep the transmission from hunting and from not knowing which gear to be in. It's still a bit weird in cruise control up and down gentle hills. Someday I hope to make a video to send to Toyota showing the issues with the odd gear selections. (And my '17 supposedly has the updated firmware).
New 8 speed transmission...
And, there is no rear DVD screen removal cover for the back of the front seats and likely won't be. There is just isn't enough demand to make it worthwhile for anyone.
@Brushie has not been on since last June and when I contacted his fabricator/installer for the covers, there was no enthusiasm for a small production run.
That said, the +16 trucks are out of this world amazing and have lots of control and tech updates. I would hate to see the rear screens be a deal-breaker. Maybe you should get a '16, come up with a seat back screen hole cover solution, and pay for the truck by selling the covers to those of us who are stuck with holes.