What Nostr is missing at the moment in my opinion is
- a standard for push notifications
- relays that just not are there somewhere, rather than are discoverable, also find each other and have means to connect and share notes automatically. The user should not bother about them at all, unless there is a real problem.
- Devs should not publish clients that are far from production quality, especially in app stores. Showed Nostr to so much friends, that are just checking a bit and then turn away again after first bad experiences.