I received similar emails last night - my booking is AMS-ZRH-JNB-ZRH-AMS in September.
The first email was that AMS-ZRH had been cancelled and I'd been moved to the later flight that day. No biggie but I'd have a hour and a bit only to connect.
This morning I received another email that my JNB-ZRH leg had been cancelled and I'm moved to the following day (along with ZRH-AMS). Again no biggie. But here's to hoping that these are the last changes!
I have until 17th July to accept these changes.
(I have permanent residency in ZA so can enter even if tourists are not being admitted).
signol