Wrath of the Lich King was the expansion when Blizzard decided to try make ALL Spec's and Talent Trees viable for every class.
Huge revamps and changes in gameplay were in order and every class suffered BIG changes for better.
Subpar specializations and underpowered talent trees became viable (retribution paladins changed from one of the worse specs to one of the best in the whole game)
Since then we have only seen aditions of ONE new spell, maybe TWO for each expansion. The whole gameplay remains the same for over 5 years.
Nowadays we reached a balance and it seems Blizzard is afraid to mess with said balance.
What do you guys think? There should be a massive gameplay change in future expansions or things are better to remain the same?
(one new spell maybe two each expansion)