Having flown with NVG's and FLIR along with a Night Sun with FLIR Filter....that is the only way to fly in the Dark. It certainly beats hell out of the MK I Eyeball!
Current generation Goggles don't have near the Wash Out problems the earlier ones did. Combined with even fixed FLIR systems that only give a Look Ahead View....Goggles would be an improvement.
But....of course the CAA would have kittens over it and the Operators would not want to spend the money.....and the Oil Companies would see it as increasing the Safety costs.