I noticed this change too on CAI-DXB (round trips originating in CAI). Fares that used to be flex (Q, U, B, and M fare buckets) are now all saver. Flex fares start on W fare only. That is an increase of 1300 EGP (Q used to be around 2700 EGP and now W is around 4000), or ~200 USD.
It seems that DXB-CAI fares (round trips originating in DXB) are not changed.