Cave content in the overworld?

I know this is likely very low priority if considered ever at all, but.. We've seen a lot of advancements in how Klei handles things like houses in Hamlet, keeping everything in the same server but storing it out of the map so it feels like a separate place. Some workshop mods have introduced the same mechanic in DST, recreating houses or hamlet cave areas. I'd LOVE to see an update to caves so it's handled like that. I love caves, and I feel like you miss out on so much content without them enabled.. but my PC just can't handle it anymore. The lag is unbearable, with loading times taking forever and rubberbanding a huge issue.

Alternatively, a way to activate overworld cave content and have certain biomes recreated above so you can find the toad, ruins and at least have mobs like rock lobsters, bats.. That'd be fantastic. I haven't quite found a mod that does this without feeling invasive/messy when interacting with the rest of the world. I just really miss exploring the caves and would love to see it handled another way that doesn't involve trying to host two servers at once. 

Of course, they'd have to be much smaller which is why I think at least configuring some mobs/biomes to be in dedicated areas in the overworld might work as a compromise vs. generating an entire new server & map.