Originally Posted by
Xyr
The art didn't change, it just got higher resolution. An example of change in art would be the difference between cinematic of classic vs BFA. Reworks for classes is not a change in combat, changing talents, changing numbers, adding new spells, etc. doesn't change the combat system. Just an example, it would be like WoW changing their combat to BDO style(this is an extreme example but it shows the point) would be considered changing their combat system. What they did was just tuning and adding spells. At the end of the day it's still "cast spells, queue up more spells, 1.5s gcd." Whatever defines the core of their combat, it didn't change.
Raids got more difficult but the mechanics are the same, the bosses are the same style, changing difficulty is not the same as adding interesting and new content. What they made are just natural progression of updates, but did they change the cores? No.