The protocol can be significantly reworked to allow direct connection between feed provider and client (reducing latency) and add certain things like pagination etc
Doesn’t need to be bound by event size limits either, and improved privacy
Discussion
Events can be encrypted, clients just don't do it. Latency is very low when you use a proper relay. But as I said, feel free to make something better.
Adding an intermediate hop is always higher latency, and ideal != what commonly happens
Encryption also increases event sizes (base64 encoding)