Some easy to point out problems today: hiring freeze for a large swath of the company; the loss of the very-controversial feedback system[0]; changing leadership principles to remove 'vocally self-critical'; anti-customer behavior like removing Chromecasts.
The biggest change that I see is the bureaucracy taking over. A metrics driven company has become a game of who can lie the best with statistics. The leadership principles aren't nearly as important as making your numbers look good.
When problems happen, mechanisms like Cause-Of-Error reports, previously used to solve the root problem, become weapons to use against rivals. Blame is the name of the game, not solving problems. And of course you can't make any change without spending a day writing a request to make the change and getting 5 levels of managers to approve it.
I think it will get worse. I think it's what will cause Amazon to eventually fail. A body growing fat and old, losing it's ability to fight off real cancers.
[0] It was sometimes misused, but the anytime feedback system and end of year feedback helped me grow as a human. I miss it.