Interesting.
The YYC-FRA schedule is unchanged. With the return now leaving before that flight arrives, it means that it's no longer the same plane turning around.
Either the issue is better plane use, or maybe using the same plane led to regular delays?
Personally I don't mind. I often would overnight at FRA before flying back. Although given R inventory unavailability I have stayed away from the YYC-FRA flights so far this year.