RE: When is enough
Give it a few days or a week or two to allow your body to adjust.
RE: When is enough
You have a quite a bit of leaking, I'd want to get that reduced.
What happens at 5:45 and on? Is that deep REM sleep or has something woken you up?
RE: When is enough
You have an excellent AHI. I don't change my settings or my wife's for results like that. Eveything is focused at the end of the night, and that is hypopnea, so it may not be very disruptive. It may even arise from end of night disrupted sleep. Overall, looks pretty good, and a lot of people here would gladly trade with you. No changes are indicated here, give it some time.