I use that setup (with dutch-clips) and have found it very easy to do. The whole design lends itself easily to black-bishop bag deployment. (that is my next DIY project)
I ride a recumbent.
I like to HAM it up on the CW.
I use Linux.
I play go.
Of course I sleep in a hammock!
one idea that I've been kicking around that is similar to the OP's is to have WS made where the adjustable loop is threaded through a single descender ring - tree strap goes around the tree and is feed through a loop in the strap on one end or is connected using a Dutch clip - the other end of the strap attaches to the ring with a girth hitch - user can easily remove the strap from the WS if needed due to tree sap or whatever - there is no toggle in this setup since it does not use the marlinspike hitch - only disadvantage is the need to tie a girth hitch every hang unless using a Dutch clip - advantage is no toggle to break or lose and the WS stays attached to the strap while adjusting