Agtee x1000%I don't think it'll ever change. I don't care what Landon Donovan tries to do. He can't make soccer bigger than what is like 10th most popular league (in terms of MLS).
What's needed is for this to become WAY bigger a business where developing players MATTER because they can sell the players.
But it's a bit of a chicken and the egg conundrum. It'll have to be one of the biggest leagues in the world for America to develop good enough players to sell to Europe... But right now... there is just ZERO incentive too... because MLS teams would rather buy players from Europe or South America on the cheap... yes there are some splashy DP transfer for 8 figures... but most of the times if they need a player for a playoff push, they can get a proven player who's already playing in an adult league and is a professional... and it's very cheap...
MLS is not high level but its able to put on enough of a show that it covers the costs.
This "good enough" thought process is why MLS has a challenge getting new fans. It all comes down to how the league is strucuteed. As franchises of MLS vs independent clubs that happen to participate in a league.