i think from a privacy pov it's definitely a good idea not to reveal on-chain that it's an HTLC and what was the hash lock/preimage on the happy path.
i'm not sure about how UX is improved otherwise.
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started writing something up, will see if this helps me get back in the saddle. i should probably check out how submarine swaps work first before i go into more details, lol!
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SHOT - Schnorr HTLC Obfuscation Technique
SHOT - Schnorr HTLC Obfuscation Technique. GitHub Gist: instantly share code, notes, and snippets.
Not revealing anything about the swap on-chain is already pretty much the standard nowadays: 
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