With Singapore Airlines dropping hints about "changes" to KrisFlyer, is an award chart devaluation in the works? Sadly, it appears so.
milelion.com
During latest bookings I noticed that mixed SQ/*A awards have been already devalued in the sense they didn’t match the *A award chart. When I tried to challenge the miles quoted I was given various excuses until one supervisor was honest enough to admit there has been changes to the award chard which has not yet been officially published.
Also, the taxes I paid for some recent bookings were significantly higher compared to exact same routes booked only few months ago

Those bookings involve other *A partners on top of SQ so I can’t say for sure who is to blame this. It seems that on itineraries with only SQ flights miles and taxes are still the same for now.