I feel that going forward the society and technology on a whole is getting rid of overly complicated stuff, and focus on making things simple, with things being as or more effective. It's a VERY good thing and certainly the right way for technological advancement.
I also think that it also had some side effects especially on video games, where "what currently works" is simplified gameplay. Atmosphere and art as good as it can be, but the gameplay and reward system being simplified, less demanding, because people are now mostly categorizing video games as "should be a way to relax, enjoy and have decent rewards for the most optimized time and effort possible".
Which is not a good thing for the future of video games in my opinion. A powerful developer needs to stop that and make people learn how they can have better pleasure with video games, and that they should devote time to get a worthy rewards, which would result in a far better pleasure/time ratio.
To me it's a matter of balance. It was near perfectly balanced in the past, even for "casuals". Now, it's not balanced at all and obviously problems arise. I get that WoW adapts to the market, always be, back then WoW was very accessible, but there's limit not to cross and they've crossed it. It's an important matter. If we keep making things too simple, something bad will happen to humanity. Blizzard should know that and I think it's a key to success.