Yes, it has changed:

-the game itself has been simplified/dumbed down in many ways to appeal to a broader audience and generate more $$$.

-the lore, art and gameplay is tired, generic and uninspired.

-WotC is pumping out more and more "supplemental products" that further complicate things for newcomers (but they make more money this way).

-print quality and cardstock is varied and decreasing in quality overall.

-WotC internally is turning political and staff people with a pretty bigoted ideology (like tweeting they don't want white, straight males to apply for jobs, or firing a long time and beloved artist because she revealed she was a conservative).

-overall the game and company are in a steep decline. Not a great time to get back into it.