Surprising Update!  
I really the new additions like instruction upload as word or pdf or the easier handling of images and the watermark feature. Also adding a selection of often used keywords is great. 
But as well I like to give my honest feedback for what I don't really like:

1. Making cover file and and design file neccessary for going on filling out all other details
   Explanation: For me I create all Basic information fist on computer to continue to add images directly from my phone. 
   I really like to start writing all how to steps while the project is still in the making in laser. 
   Solution: Make these parts required when hitting publish and not when switching the tabs.
2. Sorting How To steps by drag&drop
   Thats a very typical way we nowadays work on websites where you can do own posts and stuff so why only adding top down switching buttons when drag and drop would be more intuitive. This would also makes it a lot easier with just starting to write whats in mind and after that easily make placements that may be 3 to 4 steps above/below. Now you need to carefully click the right part to move it upwarts. 
   Was already a annoying part of old editor :D But maybe thats a thing you guys might consider for future updates :)
3. How to Steps still needs description. I get that it might make sense to avoid empty fields but sometimes there is no need to write something more than you already add with the Machine Settings. So it's very useless (in my opinion) to add more text so I really would love that the editor has a check if the machine settings are set the description below isn't required anymore for publishing. So if someone really needs to add something in this part they could add it. Also I think the more minimalistic visualisation isn't helping if someone only wants the settings. You really need to check where the small sections are. Maybe you can reuse you red primary color to make them stand out more.
4. Maybe making remixes more visible as well. Like adding it as own tab so people are more encoureged to do them and showcase them as anyone can directly see what creative ideas are possible. 

I'm really excited for next updates and I hope my feedback is helpful for a new opinion on the update. :)