As 6.0.5 should start being usable in survival, recipes for builder items needs to get back in, and the overall difficulty needs to be set. Tiers of technology needs to be further adjusted.

sounds pretty easy, if you want i'll look intro how to detect the difficulty level and make the machines use more energy depending on that

Actually, there's some preliminary work to be done with items first. Link to MC difficulty level is a good idea, worth a separate issue ;-)