The OP is quite well made and has some good points in it.
The genre is not struggling, judging but the number of titles around.
The more mmos around, the better.
Every mmo around has some peculiarity in it that the specific fanbase found amusing.
Not all titles under 5M subs are fail.
Play what you have fun playin, even more than one title at a time (but i envy your spare time).
Only jerks make "war" about videogames, and we're not jerks, right?