This isn't a great post for explain the simple elegance of Axolotol. There probably needs to be one.

My favorite parts comes from combining of Diffie–Hellman operations on both long term and ephemeral keys to integrate identity verification and creation of deniable shared secret into one operation.

It's a really elegant extension of NaCL's secret box to include Perfect Forward Secrecy.

There are some things that are objectionable.

GPL licensing makes Open Whisper Systems a gate keeper to using the battle tested code base for most users. This is probably unnecessary. It isn't that hard to implement yourself giving a working curve library.

We need to better explain to developers with Ellitic Curve Crypto and Curve25519 aren't scary just because the math is a little unfamiliar and that RSA and integer field Diffie Hellman are code smell.