While reading this interview with Ion Hazzikostas and Tom Chilton I noticed this point:
Classes will evolve in a number of ways in Legion. The development team is looking closely at the core fantasy for each class. Talent changes and class changes are being made - stay tuned. The PvP talent system also gives the developers room to take PvP-type talents out of the current talent trees. PvP talents will not function in PvE environments.
So, fellow Shaman players, do you think we will finally receive long awaited changes to our class?