I've played through this one as well. It looks nice, and most puzzles are easy, such that a relatively new DROD player would enjoy them.
I usually don't like spiders, but your spider rooms are the best part of this hold. You've really explored the different ways a player can deal with spiders.
My least favorite rooms are the roach horde rooms, where there is just plain too much roach smiting without the need to be particularly clever. In particular, Spider Caves 2N3W took forever.
There are a few bugs in the current version of this hold.
Crash Site 2S
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×This room has a backtracking problem. It's possible for the player to conquer the room, such that the green door opens. If the player then cuts another baby and exits south without killing the baby, they will be stuck. On return, the room will be unconquered, the green door will be closed, and the player will be stuck on the wrong side of the green door. This could be fixed by moving the green door to the very edge of the room, or removing it altogether.
Spider Caves 1W
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×This room has two backtracking problems. It has the same tarstuff-green door problem I described for Crash Site 2S. And it's also missing a raft to allow the player to return from the west side back to the east side.