Community Manager Snutt released an Update 6 preview video and answers a couple important questions.
Update 6 has been on experimental branch for a while mainly due to scheduling, but more so the way the game is developed will be changing in preparation for it to be moving from Early Access to released. Update 6 should be released to the production branch within a few weeks.
One of the major changes with Update 6 is changes to creature AI, re-writing it from scratch which took a little longer than expected and also led to some new issues. They intend to polish up how creatures work down the road, this is the first iteration.
A new patch landed as well for experimental, the first since going on summer vacation.
Pipes can be laid without the indicators to give a cleaner look.
Material switching available for more buildables
Trains have headlights?!
The explorer had two seats but only 1 person could ride in it at a time. To fixed this….by reducing the number of seats to one. So much for riding with your buddy.
Overall it will appear like a smaller update, but most of the work is being done behind the scenes which will help drive how the game is updated down the road.