Honestly the meters are pretty unimportant right now, unless you are doing last month progression, since they will be irrelevant in the coming month. If you want to play frost in WoD stick with it for now and get a feel for the spec and how you want to play it.
It's not like Frost dps is absolutely horrible, more of Fire and Arcane just outperforming. Plus Frost has better control than both other specs which helps with extra adds on some fights. Just play the spec you want to play and we'll see how things turn out in WoD. Remember, Blizzard is still in process of tuning classes so what is broken now might not be in a few weeks.