1) it doesn't really matter how fast your office is compared to others. What's left in your case is done by external agencies (RCMP, CSIS and CBSA) after all.
2) Well, it's been 6 months. The average processing time, last updated a month ago (so a new update should come this week) rose to 8 months. You're still under it, but nothing stops you from contacting IRCC any time you want, the way you want.
3) See above.
4) Well, it's up to you. But if you want the most complete picture on your application, make an ATIP request for your GCMS notes instead (free via the privacy act, otherwise 5$ through the access to information act. Better to keep the 5$ I suppose).
All that being said : your background wasn't marked as complete early in the process, which is usually required for people to get their citizenship within the average timeframe. This may mean waiting at least a little more if all you need is a criminal check made by the RCMP, with potentially a fingerprints request to come your way, or wait significantly more if it's a security screening done by the other 2 agencies. These tend to test the patience of applicants, and you can easily find posts from 2022 or 2023 applicants still waiting.
The GCMS notes, which you'll receive after a month, will tell you which background checks are completed, in progress...
Adjust your expectations accordingly.
I requested a GCMS notes request by paying 5$ today
1. Can I track the status of my GCMS notes request?
2. How many days does it usually take to email the gcms notes to me?