Problem Statement

If a user is just checking my app out for the first time, I don't want to request a review from them yet.

Suggested Solution

I could set the threshold for events higher, but it would be better if I were able to set a minimum time after first install / first event in the queue before requesting a review.

Additional Considerations

You are already recording the time for the events, so adding a check for minimum time since the first event shouldn't be too difficult. Then it would just be a configuration option. I'd suggest the default be one day.