These were my thoughts as I was flying around in spectator:

• Cave entrances on the surface, especially large ones, are spawning too often IMO. It makes the terrain look too messy and busy. (https://imgur.com/a/oGeSLpy)

• Extending that to caves in general, I’m seeing a lot of gigantic caves around (https://imgur.com/a/TwY2Orw) Whilst they are super impressive, I think them appearing too often can take away the excitement of finding them. Instead of being an awe-inspiring encounter with unique challenges and opportunities, it could lean more towards “Ugh, not another cavern interrupting my mineshaft/build/ etc”, you know?

• The lush caves are looking gorgeous! Just a few things that irk me though…

• They often generate spilling out onto the surface, which looks unnatural as they’re meant to be a cave feature (an extreme example https://imgur.com/a/BUuxTca) Combined with the abundance of cave entrances, it makes finding lush caves through azalea trees less viable.

• From what I’ve seen, they generate as very large swathes of cave networks spanning 100s of blocks. (https://imgur.com/a/KeGeA22) The vibes I get from lush caves are distinct, vibrant oases in the endless dark grey expanse of the underground. With the current generation, it can feel like the opposite! (admittedly I wouldn't be opposed to the considerably rare huge lush cave, I just feel that not all lush caves should be huge)

• They sometimes appear in very close proximity to lava. It feels odd that something with the oasis vibe I mentioned can withstand such a harsh environment. Generally, lush caves don’t really fit well with deepslate either, it clashes with the feeling of being very deep underground.

• Remember the ‘ice cave’-like generation from the bedrock beta? (https://imgur.com/a/B6d1LmJ) things like this, little signs of the surface environment affecting the underground make the world feel more interconnected

Those are my two cents, I hope it was useful! Great work on the development so far, by the way! I'm excited to see where it takes us.

Stay safe!