As highlighted by Loika on the Diablo 4 subreddit and broken down by Wowhead, the issues with the Reliquary system actually ...

After the delay of Diablo 4's next expansion, Blizzard may benefit by going all out with the game's next big batch of content ...

Diablo 4 developer Adam Fletcher pushes players towards the Blizzard research project to help the devs actually make the game ...

Although Diablo 4 isn't getting a second paid expansion until 2026, that may be beneficial for the game in the long run.