Hey @LordTiger! I'm a Minecraft veteran myself. You have some impressive looking builds there, they look awesome! As @AnnieGYG said; I'm looking forward to seeing what you can build in Boundless.
The addition of sloped blocks in Boundless opens up the door to so many new possibilities - and you no longer have to make staircase roofing.
As for scaffolding - there are grapples in Boundless, so you can hang from up high, raise and lower yourself as you build. I built most of my current build this way, and it's a lot of fun. That said, my build is above water, so I'm not sure how much fun it would have been if I'd have died each time I fell...
Anyway, glad to have you around.