Okay, let me go on a rant, because I'm sure I'm not the only one who's had base demolishment because of the stupid overhang. It is the most evil thing in this game and I love and hate it. I love it because it's an early game trap and forces players to go farther out, I hate it because of how it's used in the cave.
The first overhang is the most difficult part of the game because of how close the slime nest is by comparison to the other slime nest. So it isn't really good to even remotely put anything underneath to mine crystals. The cave on the other hand, changes that and makes it more difficult. Your solar panels are useless, your wind turbines are nerfed. So you're left with crystals. Only problem is, again, slime nests right next to resources that you're going to get jumped by. So if you build anything, odds are it's going to be destroyed.
Then again this is my experience on hard mode. So overall it does feel challenging and punishing for any mistake.