I dont think A330 MRTT will be sacrificed,
I think i must make clear what "sacrifice" i mention before.
It's not like we will totally abandon it but come into my consideration if A330 MRTT will be delayed and bugdet allocation will be slashed.
If there's no urges to purchase new plane, perhaps converting en existing A330 in SOE fleet will be short of way out. Perhaps we can get MRTT in this way through budget cut.
Anyway, i'm comfort to say no MRTT in near future.