I've been subbed to XI for a good 12 years and XIV for at least 3, but there have been points in between where i don't play for months on end, or when I didn't touch XIV because it was going to shut down anyway. Whether there was content wouldn't have made a difference because I didn't play it anyway. All I wanted was to keep my account active so I could pop in anytime if I wanted to.
If I wasn't happy, I could just unsub. SE doesn't owe me any obligation to retain my patronage. Besides, with XI, they've set their sights on a bigger market already.
And it's not like they're forcing you to play it.