Folks let's look at some facts.
8k v1 prototype Jan 2017 Ces
8k v2 prototype 8 to 9 months later
8k v3 a month n half later?
V2 was a huge improvement over v1. V3 had good reviews.
The issue i see is they are trying to advance their prototyping too fast.
So v5 was a bust; simply means take what was good & go back to v3 to create a v6. But slow down.