1. Maybe, but, we hope, it will change soon.
2. We launched our pool two days ago.
3. What exactly is incorrect?
4. Again, which one is incorrect?
5. You can disable automatic updates and just download new versions manually. We are planning to continuously improve our software so it will be probably not convenient to download it every time.

If you don't trust our binaries, you can run them in virtual machine or in docker.
We have opened an official docker repository:
https://hub.docker.com/r/nossd/client