The game still has content for experienced players but blizz killed the soul of the game, if you were a wow player you know what i am talking about, mmos require commitment but people wants everything and is not necessary to stay 24/7 playing on the pc as they say to obtain the best things in the game, just check the last stats about the dragon soul raid and see the ridiculous ammount of people who completed dragon soul in normal mode since the introduction of LFR, completely absurd, classes and specs are homogenized with a really low skillfloor because people would quit the game before learning a class with a decent learning curve, we can take this as an example of things taken to the extreme.
Devs can make an accesible game without killing the soul of it as you said before, we can make decent tutorials and content to encourage them to be better and devs can remove unnecesary things in the game that bothers new players as fresh lettuce said above we need to see this from a grey “perspective”, MK is a great example of how to make a game for both audiences with great content and competitive gameplay. Another risk when you try to dumb down things when you had a superb gameplay design before the community divides itself and flamewars are really common, hopefully devs can take these examples for their next games because is really hard to please both audiences, fortunately you can find great players who provide great feedback about the games and they learn from that.
Some players have the wrong mentality, KOFXIII is an example, when they see some sick trials or ridiculous combos in youtube they want to do that in a short period of time when the real purpose of those trials is to show the combo skillcap of those characters and some of those trials are really impractical in real matches, you don’t need to land sick combos in order to win a game and the game is really accesible with shortcuts and basic bnb’s and you can be successful,
We had some curious examples this gen about this, maybe the true accesible game that some people wants is really near, we just have to wait 
Unfortunately some of those games are not designed for competition thats why you see a lot of salt and endless drama in their communities, specially COD and WoW, SC2 is a game designed for competition and has a great community that’s why you see a great competitive environment for the game, the difference is quite clear.
As a 2800 player in wow arena you only need to focus in a few things: CD management, Communication and positioning (and of course a nice attitude), because a lot of things are homogenized, and is really easy to do if you have a class with ridiculous CD’s: keybinds, macros, UI, flavor of the month setup etc.
You can create competition on everything but another thing is the environment.