Thanks for asking!
- Curator has been semi-deprecated in favor of ILM and SLM. For use cases where these aren't meeting your needs, Curator can be used.
- Yes, but there were so many changes and improvements to the elasticsearch python client that the code has to undergo a massive refactoring (which is still ongoing).
- Curator will continue to exist, but as I am no longer a full-time developer at Elastic, my coding time is sporadic at best.
That being said, ILM and SLM are still preferred. As ILM and SLM are policy based, they are much more resilient than a cron-executed Python script. You can find lots of help here to help get those working for you, if you're interested, and if your Curator actions can be translated to ILM/SLM.