Actully it would be just as easy for blizzard to bring back two hand to enhance as it is to bring it back to frost.
Look at https://us.forums.blizzard.com/en/wow/t/2h-frost-needs-to-come-back/404947/2
This list way for 2h to come back to frost. Obviously we can not use all of the suggestions as it is concerning the runes that DK’s can put onto their weapons. But yes we can get it back.