I think it is understandable and ok to be frustrating and vent sometimes, these processes are out of our hands and that uncertainty does not feel good. I hope you get an update soon!
Official timeline for Citizenship grant applications has been adjusted to 13 months, I think it matches the extra month to 2 months delay we have been seeing compared to applicants in Feb or March.
You do not. The only email I got was for test and test complete. Nothing for BG. I am assuming there will be nothing for LPP and then an email for Oath.
Some of these updates seem to be batched for example BG clearance on 28th Aug, perhaps there will be another batch for oath? I am on BG since the 28th, waiting for LPP