Concept sounds straightforward and extremely appealing.

Extend the simplicity to app start and onboarding, like

- 1 tap onboarding, make all profile information entries strictly optional, like name, bio.

- Faster app start with no splash screen

Other ideas

- Optional BOLT12 payment address field? Just to finally give BOLT12 so traction

- Message reactions and replies

- photo, video, PDF files copy paste support

- no stickers, gif libraries distractions