If I'm looking at the OP's illustration correctly, I could apply this technique to only the hammock ends. I could keep my fixed ridgeline, but have an adjustable loop suspension at each end of the hammock. They would be separate from each other, not continuous.
I have a small continuous loop larks headed to the end of the hammock; this adjustable loop would go through that. The other end of the adjustable loop could be attached to the tree strap with a marlin spike hitch. Then, I could shorten the loop down to the bury length, about 8" for 7/64" Amsteel. That's a lot shorter than anything else I've tried!
"Life is a Project!"