I did the usual "Build your islands" approach as well. With a huge farming platform, never wanted to eat bugs and worms again.
But now it's time to start over with a somewhat different approach. "The Jaded One" saved us to rebuild the world and that is exactly what I'll do ... literally, chunk by chunk. Including forests, rivers, some smaller mountains, sand deserts etc. And then rebuild the civilization with farms, industrial facilities, NPC villages etc.
The material costs shouldn't be a problem. The main surface will be at level 60ish with 4 levels of stone below. That's 4 stacks of dirt and 16 stacks stone per chunk. A few barrels for composting stuff, some Igneous Extruders and a Pulverizer or two for the sand. And the Builder's Wand makes it super fast to fill a new chunk.
The goal is pretty much to make the world look as natural as possible ... as long as you don't dig too deep.
PS: It probably can't be repeated often enough. Thanks Jaded and team for this amazing pack. Really different from Monster, quite a challenge to get everything set up - and so much fun!