It has absolutely become better. They have added more content you can do solo than ever before. Any additions to the game, similar to solo-friendly content or not, is better.
What you consider "solo-friendly" once again has to come into question. You've spent years trying to explain your stance and never can do more than vaguely post what you think Blizzard's intentions are, throw out random and arbitrary numbers for statistics you pull out of your ass, and never once answer the very first question: why do you still play WoW if you truly believe the drivel you spout about it?
And this "core audience" you keep referencing: you mean the people who... play the game?
Who do the things in-game that are available to them?
Or do you mean people who aren't you