I have 'excepted' the devaluation. It looks like double points are here to stay across most departments, as mentioned there has already been a reduction in 'voucher worth' across other deal areas, and so this does not come as a massive surprise.
The only question and concern i have now is do i convert my vouchers into "not necessarily needed right now" miles at the higher current rate or do i gamble on another double miles offer or similar coming along in the next few years. Your thoughts would be greatly appreciated??