Originally Posted by
Schizoide
That's always been users' problem with borrowed power, the "borrowed" part means you need to give it back. The devs agree with that (now), but that isn't primarily why they changed it. They changed it because they were spending untold person-years of effort to build complex systems and user interfaces... and then throwing them away in two years. So now they're trying to focus their effort on evergreen systems rather than ephemeral ones.
The ring is absolutely an ephemeral system, and it is absolutely borrowed power. BUT, how much effort did it take to implement? Very little. There's no UI, it's just a couple of custom gems. Probably took the same amount of development time to build as two or third tier bonuses. No big deal, compared to something like Azerite armor. And while it is borrowed power, so is tier gear, and so are trinkets. This is comparable.