Caves & Cliffs Update - Cave Intersection

Hello Minecraft Dev Team!

My username is ClariNate, and I have been spending sometime messing about in the recent snapshots for Minecraft 1.17. 

In terms of feedback, I feel as if (in terms of the new cave generation system) the "old caves" should have better intersections with the "new caves". In my experiences, and the videos I have seen thus far, it feels as if the new cave generation simply places a barrier between itself between the old generation, a physical one, normally made of a type of stone, yet I believe it would really expand the possibilities if there was a proper entrance from the end of one "old style" cave type, to an open and expanse "new one". The one time where I saw this was the case, was a simple 1x1 hole and it looked like it was due to generation error. 

While this may already be the case, I have not seen personal (actual) evidence of it.

Thank you, and have a good one!