[build mode- manually set root block]

From what you're writing it sounds like the actual issue is the safe mode warning about deleting the root block, even though it's unnecessary?

[Some thoughts on the User Experience and the Interface]

Voted for this as well! 🙂 Tons of good proposals in here, I'll be happy to implement those. We won't be able to add everything but I'll see what we can do! (some of these are way more complex than you might think)