It could be because the farm is lower in the sky. It could also be if you are aking at the bottom, you would lot a bunch of caves. Try afking above the farm and see what happens.
My ideas for improvments: In the photo with the door, add a border, because glass panes and doors dont look too great connected to each other. Remove the glass that is in front of some cobblestone in the first picture
I like the idea of a base in a ravine that isnt just open on one side, but on both.
I keep my main survival world on the latest stable release, creative building worlds on snapshots. Unrelated, why do speedrunners prefer 1.14.4 for speedrunning over 1.15.2?