It would be very nice when there is a log per subscriber so you can see which newsletters the subscriber opened and things like that

Is there a way to view summary statistics for all newsletters for a specific subscriber? (e.g.: number of newsletters sent, number of newsletters opened, number bounced, date of last open, date of last bounce, etc.)

If not, please consider adding such a feature. Such statistics could be displayed at the bottom of the Subscriber edit screen.