I feel the difficulty rating basically keeps bouncing from like 4/5 down to 1/5 as you work your way through it.

When you first arrive, everything is a threat. Then you craft new armor and it's a bit easier. Then you get a better weapon and it's a bit easier. Then you upgrade your foods and it's a bit easier. Then you upgrade your weapon and armor to max level and it's a bit easier.

Then you arrive in the next biome, and repeat the process.